I use clear Krylon. It gives a reasonable finish. Just make sure the
nozzle isn't spitting so you'll get a uniform coating. Also, don't
overdo it!!. Real MFP generally has a yellowish cast to it, whereas
clear Krylon does not. If the knobs are dark, it won't matter. If
necessary, one could use a tinted varnish, applied manually, but the
spray is a lot easier. Good luck.

Roger D Johnson wrote:
I removed the MFP from the knobs of an old HRO I
purchased. I subsequently decided that this was a
mistake and want to restore the knobs to original.
Is there anything that can be sprayed/painted on to
restore the original look of the MFP?

Thanks, Roger