Re-blackening Project

My bumpers, trim and wheel arches are nearly ash grey, and should be black.

After a bit of research, i found out the best fix resides in black leather shoe dye, specifically Kiwi

You basically apply it like paint, but it soaks into the old plastic, instead of creating an additional layer like paint would. The paint would not stick well since the bumper has been oxidized after years of being in the sun.

Ill post pictures when i finish my little science experiment