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Beitrag von: sever Date: 14.02.2010 Thema: PVC Scheinwerfer Reinigen ,Reparieren ---------------------------------------------------------- Hallo zusammen hab was interessantes gefunden wollte es mit euch teilen op das stimmt hat jemand schon mal sowas gemacht ist aber auf englich *Disclaimer: Headlight UV protection may be ruined as a result of sanding/wetsanding. Improper use of the materials involved can result in permanent damage to the headlight. Please use caution and attempt this process at your own risk. *Only use sanding/wetsanding as a last resort if there is no other option for the headlight. Always start out with the least aggressive method which would be polishing by hand or even by maching without wetsanding. *Best strategy is to get a junk headlight and pratice on that, then duplicate the process on your own headlight. I used my brother Focus lights as practice. Well, I've got another little write up. I reconditioned my headlight today and thought I'd share the process. Products used: 3M wet/dry sandpaper, 350 grit(dry) 800 grit 1200 grit 1500 grit 2500 grit CE Rotary polisher w/wool polishing pad Plast X 5 gallon bucket spray bottle with water and 10% detail spray 3M sponge pad Painters tape microfiber towels ![]() Process: Pics of the headlight before I started. Alot of rock chips, scratches, and alittle oxidation. ![]() ![]() ![]() ![]() I put sheets of 800, 1200, 1500, and 2500 and let them soak in warm water for thirty minutes. ![]() I used painters tape to mask off areas of the fender and bumper that touch the headlight. Definitely don't want to accidentally sratch the paint. ![]() Then I cleaned the headlight really well and wiped it dry with a microfiber towel. ![]() I wrapped 800 grit(dry) around the sponge pad and started sanding the headlight side to side in uniform strokes. ![]() ![]() 800 grit wasn't cutting deep enough to get rid of the rock chips so I stepped up to 350 grit(dry). The 350 worked well and took off a good amount of plastic to expose fresh plastic below. Saved alot of time, 800 would have taken too long. ![]() Next I used 800 dry, 800 wet, 1200 wet, 1500 wet, and 2500 wet. This is the healight after the last stage of 2500. All the wetsanding is done and the headlight is dry ready for polishing. ![]() Now time for polishing with Plast X. ![]() I then setup the rotary with a wool polishing pad and set the speed at 1200 for the first pass. I started polishing small sections at a time using moderate pressure ![]() Here's a picture just after one pass with the rotary. Already looking great after one pass. ![]() Then I did three more passes with the speed set to 1800 ![]() Here the finished headlight pictures. I was extremely happy with how it turned out. Looks like new. ![]() ![]() ![]() ![]() ![]() Danke : Sever BMW E46 |
Autor: VaBene Datum: 22.02.2010 Antwort: ---------------------------------------------------------- Uha, ich weiß nicht wo ich hergelesen habe, vieliecht auch sogar in diesem Forum. Was ich hörte/lies ist, dass die Frontscheinwerfer eine "Härtung" oder Beschichtung haben. Heißt diese nimmt mann mit dem Schleifen weg. Dann sind zwar kurzfristig alle Kratzer weg, kommen aber deutlich schneller und stärker wieder. Ich glaube nicht, dass die nachträglich aufgebrachte Politur eine solche Beschichtung wiederherstellt. Von daher Vorsicht! Das Erblinden alter Scheinwerfer kommt nicht wie oft angenommen alleinig durch Steinschläge, sondern durch Alterung des Kunsstoffes. Cheerio Bene |
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