I was storing my windshields from cars with other my bricks. Now they are scratched, nearly not transparent just translucent. Is there a way to sanitize transparent parts from scratches?
Haven't tried this with Lego, but here are the first two things that come to mind.
Novus plastic cleaners (they make 3 solutions for various scratch depths, with Lego I would probably buy the one for the finest scratches) work well on my pinball machine plastics.
About the transparency, I would try the standard headlight cleaning solutions for a car.
You've got three different approaches: 1) products that fill the scratch, 2) products that essentially dissolve the plastic material so that it re-hardens smooth, 3) products that help you polish the scratch away.
- A silicon-based lens cleaner can do this and works for small scratches or some "cloudiness", but it won't be perfect. For example Bausch & Lomb or a furniture polish with wax.
- It is likely that the Novus and similar products fall into this category, but they rely on polishing for the finish... similar to CD or DVD repair.
- Here is a step-by-step method using household toothpaste.