Restoring 1986 Porsche 911 black trim
 

Trying to see if anyone has any newer recommendations for restoring older black trim on the bumpers for these cars. I found a few threads but they seem to be dated. Any more updated ones???

Thanks!

i still find the old way using petroleum jelly works best.
get the bumper guards nice and warm then spread the jelly over it with a nice heavy coat let it sit for 5 or 6 hours out in the hot sun. then let it cool back down and wipe the jelly off.
if they are to old and starting to disintegrate then they are to far gone and past help.

Might try this, works good on anything PVC:

https://www.eastwood.com/ew-plastic-resurfacer-matte-black-aerosol.html

Eastwood Plastic Resurfacer Matte Black Aerosol
Item #15089Z Brand: Eastwood

there are other products like the eastwoods resurfacer the problem is your dealing with rubber not plastic.
the rubber bumper guards on 911's are like the rubber on the 944's rear spoilers and bumper guards.
once the very thin layer on the outside fails your left with a porous surface under it once the rubber gets to this state your pretty much screwed as there is no easy way to save it.

Thanks guys!