Repair / Restore mudflaps

[WineAnt]

Hi everyone

My '93 Ford TX5's mudflaps has these like polish like residue left on the black parts of the mudflaps. I tried cleaning it the normal way when washing a car, but it is almost like a built-up of something which makes the black parts look dull and white-ish.

How can I restore the mudflaps to its original state, without damaging it in the process?

Thank you in advance.

[dirty hands]

that sounds like clear coat overspray
is your car paint metalic or acrylic lacquer

if it has been resprayed in two pack I dont know what chemicals are in that

then ask for a clear coat /acrylic lacquer thinner to remove this layer
it will not come off easily at first because it has aged and hardened
the Thinner reactive on some rubbers not all
before you use it on the outside of the mudflap
first test a small amount on a rag
in the inside of the mudflap in case it bubbles /reacts