There is also Meguiar's PlastX. I have tried it here in Qatar (Sun and Temperature...), it works magic!
As for the smallcar lenses, I have them. Never had issues with them changing color. I dunno what you guys are talking about.
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Danny
1994 Silver SVX in hybernation, awaiting for the
monsterous awakening (Lebanon)
1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration
2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection.