So far i have took the glass off, and then took the inside chrome part out. Icy of ed38 says i dont need to tint the glass, just spray the insides of the plastic matt black, then paint the unused chrome parts matt black too.
Went and bought matt black paint, and brushes, and masking tape, but forgot the spray paint for the plastic cases, and its raining, cba to go back out, so will get it later on this afternoon when i have to go, and continue the trial.
Im doing this one on a old mk3 lamp i have about, so i dont mess up the vento lights on my first attempt