Hell, I've got an '85 Westy and the clear/chrome strips that fit inside the
window seals on my bus were all faded various shades of brown and orange -
looked awful. So, wanting to improve the appearance but not wanting to
spend the $100 for a new set of inserts I went to my local hobby store and
got a bottle of Model Master flat black paint which I thinned out to about
60% paint, 40% thinner. This was brushed onto the plastic insert, which
soaked it up nicely and left me with a euro look window set. Took about an
hour and a half to do all the windows. Made a really big difference in how
the bus looks. Also the front grills were all faded and speckeled. Went to
a Auto paint supply shop and tried something called "Bumper Magic," by Auto
Magic, which was recommended by the list. Didn't help. Sales people
suggested another product by Auto Magic - black paint designed for vinyl
and carpets. Took off the grills, sprayed this on in many light coats.
Again, look like new. This is a highly recommended product! It's a
specially formulated rubberized "paint" which is flexible so it won't crack
or peel off.