73aussie455

I've been detailing all the usual under the hood, firewall, brake booster, air cleaner, brackets, hoses etc, and am looking for a solution to restore the finish to the plastic inner guards.
Everything i've tried leaves a dull or patchy finish. I'm not after a concourse result, just a consistent finish.
I've tried; Plexus (plastic cleaner & polish), kitchen cleaner(spray & wipe), Armourall, turps, metho, soapy water and tire shine.
My last resort is to mask it all up and use satin black spray paint. (not ideal)
Any ideas? Thanks.

Yellowstatue

If they are clean and all the dirt is off, try a good quality boot polish. However there are other threads here that address this specific problem.

73aussie455

Thanks for that, found the info

jpc647

What'd you find out? And how did it turn out.

73aussie455

I found lots of threads on cleaning and restoring engine bay plastics, this is probably one of the best;
https://classicoldsmobile.com/forums...mpartment.html

I really didn't want to paint with SEM or a plastic/vinyl restorer.

Ended up persevering with the same stuff I use on my race bike, PLEXUS plastic protectant, cleaner and polish, made in the US.
http://www.plexusplasticcleaner.com/about.html

Seems to work great, stripped the crud right off and left the original colour. I had to get a little aggressive where the A/C clutch sprayed grease/oil in a line next to the compressor for the last 40 yrs and there are a few abrasions where pipes have been rubbing, but I will leave it as is. Very pleased with the result.
I've used it on all the under hood plastic and external body plastic.