Thomistopheles Posted February 15, 2013 Share Posted February 15, 2013 Once the factory UV coating has worn off the plastic lenses of your headlights, they'll start to haze over and yellow. Store bought headlight restoration kits provide means to remove the oxidation, but nothing to protect the lenses from UV after you're done... this is why the results don't last and you have to keep buying more kits. The method outlined in this thread will restore the lenses and then provide long lasting protection from UV, years of clarity as opposed to a few months. Supplies and tools: 400 through 2000 grit wet/dry sandpaper Bucket o' water Meguiars M105 compound (or equivalent) Meguiars M205 polish (or equivalent) Foam pads, one light cutting and one polishing Microfiber towels Isopropyl alcohol Mineral spirits Minwax Helmsman Spar Urethane, clear gloss Heat gun (optional, faster cure time) Before: I removed some 5+ year old rockblocker film. It left a thick adhesive residue behind, which required removal with a plastic razor and 3M adhesive remover on a rag. This photo was taken after cleaning it up. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140297_zps1ec991bf.jpg 500 grit wetsand I soaked all my sandpaper in a bucket of soapy water and started wetsanding. Remove any scratches, pitting, and remaining factory UV coating in this step. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140299_zps93f32774.jpg 800, 1000. 1500, and 2000 grit wetsand Pretty self explanatory. Work the headlight progressing through finer and finer grits, until you hit a minimum of 1500 grit. M105 can handle removal of 1500 grit scratches, but I prefer to hit it with 2000 grit for a better finish. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140300_zpsf79f3023.jpg M105 and a light cutting pad In this step, I used a Lake Country light cutting pad with Meguiars M105 compound. This removes the scratches from wetsanding and gives the light clarity again. M105 leaves its own swirls and haze, so follow it up with a less aggressive polish and pad. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140301_zps612bc13a.jpg M205 and a polishing pad This step removes the haze left behind by the M105, leaving a glass-like surface. After this step, wipe the headlight with isopropyl alcohol to remove any contaminants or oils left on the surface. The lens is now ready for coating. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140302_zps7d2b6274.jpg Mix Helmsman Spar Urethane and mineral spirits 50/50 You don't need much, I could do two sets of headlights with 30ml. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140307_zps27564efb.jpg Urethane mixture applied Fold a clean dry microfiber OR blue shop towel so you have a 1 inch square. Dip it in the mixture and apply the coating using overlapping vertical strokes, then overlapping horizontal strokes. The coating will self level, but watch for air bubbles, runs, and contaminants. If you mess up, mineral spirits are your friend. You can use a heat gun to speed up cure time, and apply as many coats as you like. http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140305_zpsd53e5947.jpg Finished headlights http://i489.photobucket.com/albums/rr260/TurboThom/Headlight%20restoration/_1140308_zpsa5fc1657.jpg Another before/after example http://i489.photobucket.com/albums/rr260/TurboThom/_1110433_zps006edf9f.jpg http://i489.photobucket.com/albums/rr260/TurboThom/_1120449_zps3d912d46.jpg Link to comment Share on other sites More sharing options...
Stang70Fastback Posted February 15, 2013 Share Posted February 15, 2013 Damn dude. Link to comment Share on other sites More sharing options...
LegacyLou Posted February 15, 2013 Share Posted February 15, 2013 Outstanding Return ! Link to comment Share on other sites More sharing options...
monkeyposeur Posted February 15, 2013 Share Posted February 15, 2013 Sweet! Can you pour whatever Helmsman and spirits that are left into the gas tank to clean everything else up? Link to comment Share on other sites More sharing options...
Thomistopheles Posted February 15, 2013 Author Share Posted February 15, 2013 lol, I don't think the inside of your tank needs any UV blocking urethane in there. Also, bonus Husky content: http://i489.photobucket.com/albums/rr260/TurboThom/Huskybutt/d6a4e386.jpg Link to comment Share on other sites More sharing options...
spooln30 Posted February 16, 2013 Share Posted February 16, 2013 Thanks for the tip on sealing it once done. People have said to use clear coat paint in a rattle can but I've never wanted to try that. They look better than new. Link to comment Share on other sites More sharing options...
Analog Posted February 17, 2013 Share Posted February 17, 2013 Wow, great job! I'll have to do this. Thanks for the write up! Link to comment Share on other sites More sharing options...
Shoe Posted February 17, 2013 Share Posted February 17, 2013 wow that looks great. I've used 800 grit sandpaper and polishing compound and thought it came out good, but yours look 10 times better. I'll try again and also use your coating method. This is perfect timing; I was just about to start on my daughters Bronco headlights. Link to comment Share on other sites More sharing options...
Thomistopheles Posted February 18, 2013 Author Share Posted February 18, 2013 I've seen a lot of posts lately where people are using headlight kits, so I figured I'd share my method. This spar urethane is as good as it gets without making a large investment into UV cured coatings, you can generally get 2 years out of it. Do at least three coats, any less and the longevity drops off. I'm very excited about a new product from Optimum Polymer Technologies. They're releasing a new coating for plastic headlight lenses, similar to opticoat but with UV inhibitors and acrylic for added flexibility to account for temperature changes. 3-5 minute cure time, easier application. If it's as good as Opticoat, it will be my new coating for lights. Link to comment Share on other sites More sharing options...
Bandit240 Posted February 18, 2013 Share Posted February 18, 2013 Now you say to do 3 or more coats after I already reinstalled the headlights on my wife's 95. Link to comment Share on other sites More sharing options...
Thomistopheles Posted February 19, 2013 Author Share Posted February 19, 2013 Hah, yeah I'm always updating my headlight threads. One or two coats will still last a long time. Link to comment Share on other sites More sharing options...
Bandit240 Posted February 19, 2013 Share Posted February 19, 2013 I may try this on my boat windshield. It's made of plastic and I'm cleaning it all the time to keep it clean. Link to comment Share on other sites More sharing options...
Sludgeroo Posted February 19, 2013 Share Posted February 19, 2013 ^ also if you wanna spend the $ go to lexan, but this should help as well. Definitely will reduce yellowing. Link to comment Share on other sites More sharing options...
Stoltz Posted February 20, 2013 Share Posted February 20, 2013 Wow I'm doing this to my lights this weekend!!! +1 on the writeup Link to comment Share on other sites More sharing options...
mattmattyxcore Posted February 22, 2013 Share Posted February 22, 2013 Wow that is amazing and seems incredibly simple. I have to get a new set of headlights this weekend and with this info, I think that any set without broken tabs will work! Link to comment Share on other sites More sharing options...
twisty Posted February 22, 2013 Share Posted February 22, 2013 good write up, im doing this to my fogs this weekend. never would have thought of the after coating, ive always just used a clear rattle can for it. Link to comment Share on other sites More sharing options...
laz Posted February 22, 2013 Share Posted February 22, 2013 Good write up. Professionally here they use car clear coat from a spray gun. They do 400, 800 and then two coats of clear. No buffing as the buffing makes the surface too smooth for the clear to adhere. It comes out crystal clear with UV protection. I have done it a few times myself. X --- Link to comment Share on other sites More sharing options...
Thomistopheles Posted February 23, 2013 Author Share Posted February 23, 2013 Glad you guys are getting some use out of this. I cringe every time I go past a subaru with messed up headlights. The rest of the car could be beyond perfect, and the headlights would still ruin it for me. Ideally I'd be using one of the pro coatings that is cured by UV lamps, since they meet/exceed OEM UV coating specs... that's a larger investment in the lamps and the product though. $50+ per can and anywhere from 150-250 for the UV lamp. This method is great for guys like us who want relatively long lasting results, easy application, quick cure time, and low cost. If you guys are looking for an accurate way to measure the urethane and MS, grab a 10cc syringe from a drug store. Much better than eyeballing it or trying to use a measuring cup. I had a bunch lying around for measuring film developer, came in handy for this. Link to comment Share on other sites More sharing options...
spooln30 Posted February 26, 2013 Share Posted February 26, 2013 I recently did my fogs and headlights. The HL were actually in good shape no yellowing just a little bit of hazing on the right HLs top. The fogs were more beat up. I tried the Urethane on the fogs first to get used to coating them and I couldn't get the Urethane to not create air bubbles. After a few times trying and retrying I left the last coat and didn't apply urethane to my HL. Since they weren't bad and I wax my car a lot I should be ok. I have a buddy that does auto body and if it turns for the worst ill have him clear coat them. I used the 3M kit and they are so clear now I want some HIDs. LOL. Link to comment Share on other sites More sharing options...
Thomistopheles Posted February 26, 2013 Author Share Posted February 26, 2013 You might have been wiping it on too fast if you were getting air bubbles. Slow down the movement, no pressure...just drag it across the surface. One horizontal stroke on a light the size of a 1 piece Legacy headlight takes me a little over two seconds... can't rush. Link to comment Share on other sites More sharing options...
Thomistopheles Posted March 15, 2013 Author Share Posted March 15, 2013 Another set o' lights from a legacy. http://i489.photobucket.com/albums/rr260/TurboThom/P3140522_zps9ec3c800.jpg Link to comment Share on other sites More sharing options...
Hemingway Posted March 16, 2013 Share Posted March 16, 2013 Excellent write up! Thanks for taking the time to share your experience. Link to comment Share on other sites More sharing options...
cal71919 Posted April 1, 2013 Share Posted April 1, 2013 I was just about to go out and but one of those restoration kits. Glad I looked here first. Link to comment Share on other sites More sharing options...
muzzrx Posted May 6, 2013 Share Posted May 6, 2013 I've just started this Process on my Gen4 Headlights, Will post results. I've just finsihed wetsanding 800grit. already looking better. Mine were fading hard. Australian Sun is harsh !! Link to comment Share on other sites More sharing options...
twisty Posted May 10, 2013 Share Posted May 10, 2013 my new GT has an additional problem. the lenses are pretty clear, but someone before put on some lexan looking shields. they are peeling off on the edges so it looks like crap, and im betting there will be a ton of adhesive residue left. im hoping i can even clean these suckers to do a restore on them. Link to comment Share on other sites More sharing options...
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