Making scratches less noticeable on dark gray plastic engine cover -?

I have a Johnson 35hp engine with a dark gray plastic cover on the top which has gotten banged up %26amp; scratched quite a bit over the years thru use - I tried polishing %26amp; rubbing compound, and mGuires cleaner/wax liquid, but it ends up just leaving white residue in the scratches and its still noticeable - I remember there used to be a colored wax product sold at auto stores specifically for covering scratches in paint on cars - you could buy it in blue, black, gray, red, all the basic colors. It seemed to work pretty good when I tried it years ago but I haven't seen it on the market lately. I was also thinking about something oily %26amp; shiney, like maybe Tire-Wet liquid, or Son-of-a-Gun vinyl protectant type liquid, but I know they may be temporary and dry out after a while. Does anyone know of a way to make the scratches dark %26amp; wet looking so you can't really see them as much? Maybe a home remedy would work, like mineral oil or something?? Any ideas from experience would be appreciated. Thanks.Making scratches less noticeable on dark gray plastic engine cover -?
Try something called back to black. Works a treat.Making scratches less noticeable on dark gray plastic engine cover -?
I would use a filler designed for use on plastics.

a good auto paint store could probably advise the best one

clean the surface thouroughly

smear it into the scratches

let it set and wait a few days so any shrinking can occur

use 400 grit sand paper to smooth it

use very fine wet and dry paper, say 800 grit to smooth it down whilst keeping it wet.

then i'd dry it.

clean it with pre paint

rub it with a tac cloth

then paint it with high temperature grey paint.

if that sounds like too much work then just clean the surface as it is now and spray paint it with high temp matt black which wont show up scratches as well.

otherwise buy a new cover if you can.Making scratches less noticeable on dark gray plastic engine cover -?
you.dont.wax.plastic..



pretty.much.only.way.to.hide.them

is.to.use.what.you.said

vinyl.protectant