Not having any experience in vehicle related restorations, I did not understand the consequences of using these cleaners on the 33 year old plastic.
I first brushed off all the loose dirt and grime with a toothbrush. Then sprayed them down with Super Strength Greased Lightning cleaner along with also using Tub O Towels Heavy Duty Cleaning wipes. During this time is when the lenses developed a chalk like film over them. Trying to remove it was a real pain. I soaked them in warm soapy water and rubbed them using a purple Scotch Bright sponge, didn't work. Then moved onto an Armor All head light cleaning kit, which also didn't work removing the film . Ultimately what did work in clearing up the lenses was another lense cleaner called Quality Aerosols Brite Lites. Then right before we applied the clear coat my father used commercial grade jeweler polish to buff the lenses.
To do the trim, I just taped off the centers with painters tape and used Krylon Fusion All-in-One paint and primer matte black spray paint. Applied 3 or 4 coats. Then used Dupli•Color Perfect Match Protective Clear Coat Finish.
I truly believe the best way to clean the lenses before applying the paint would just be soapy water and some Windex. I hope this helps. Good Luck!!!