| Paint is the only real answer. The plastic gets yellow all the way through.
I worked for a dealer once that the owner was obsessive about bright covers. One day I got myself some fine grit sandpaper. I took an older Sharp analog and sanded all the covers. It's not quite as yellow all the way through the plastic. Not much of an improvement, and a lot of work.
When Ikon was selling refurbs out of Mexico, the machines arrived with a powdercoat paint job. If you try to clean this kind of paint job the paint cleans right off, revealing the yellowed original covers.
=^..^= |