Novus Plastic Polish dude, comes in 3 stages... from what your saying you could most likely get away with just Stage 1... it shines it up nice... stage 2 is for a deep hazyness or very shallow scratches... stage 3 is for deep chips and scratches... and I don't even know if the plastic on blinkers would be strong enough for stage 3. Look on ebay for it... search for "novus plastic" or "novus polish"... something like that. I bought it for my headlights and am going to use stage 2 and 1... and if I have to I may use stage 3. I have heard really good things about it and if you want I'll let you know how it goes. Here's the link to what I bought... I figured 2 ounces would be plenty for just this small project. And it's rather cheap.
http://cgi.ebay.com/ws/eBayISAPI.dll...311468872&rd=1
VRGNCD5: I know what you said... I'm not saying you are going to tint your headlights... I was just using it as a comparison. I don't like how tinted headlights look, so I doubt I would like how tinted bumper lights look. I'm not a fan of tinted lights... I like black housing lights. So I said, I would much rather have a pair of black housing bumper lights, rather than tinted ones. But yes I have heard the Wal-Mart stick on tint works fine and wont chip. IMO the spray would chip a lot, and I think cryogen said he tried the spray and that it did in fact chip. I just don't like it personally. I'd rather have amber than that. BTW, why not just try, and if you crack them, either go with amber, or buy a new set of euros, they are only like $25 shipped or so... If I decide that I don't like how the euro looks with my JDM headlights and corners, I am going to put amber back on, and use the old euros to try to blacken them. If I mess up then o well, and if it works the it'll be sweet. I'm gonna use a dremel and cut along the line where they are GLUED together... why couldn't they just be like headights. I'll then just glue em back together. We will see I guess.