G1 Optimus Prime touch-ups

Looking for a chair warranty yesterday, I took G1 Prime out of the drawer and thought he could use some touch-up. Then I figured -- why not? 1. it's not like I intend to sell him; 2. not a childhood toy, a friend gave him to me years ago; 3. I have the Hasbro MP-10 anyway (aka The Most Amazing Toy on the Planet.)
So far I used a silver pen/marker/whatever on the front of the grill and bumper, it looks fantastic if I may say myself. No blotches or issues, it shines and brings out details that were hard to see in dark blue. (I didn't take a "before" pic, but they were almost entirely blue.)
When the paint is completely dry I'd like to do the sides of the above; the smokestacks, upper legs and everything else that needs silvering-up.
Any tips how to avoid accidentally touching the red/blue parts? (hasn't happened yet.)
Can hardly wait to get it done and get a pair of hands for him. Maybe I'll remove those silly stickers from his lower arms, too.


So far I used a silver pen/marker/whatever on the front of the grill and bumper, it looks fantastic if I may say myself. No blotches or issues, it shines and brings out details that were hard to see in dark blue. (I didn't take a "before" pic, but they were almost entirely blue.)
When the paint is completely dry I'd like to do the sides of the above; the smokestacks, upper legs and everything else that needs silvering-up.
Any tips how to avoid accidentally touching the red/blue parts? (hasn't happened yet.)
Can hardly wait to get it done and get a pair of hands for him. Maybe I'll remove those silly stickers from his lower arms, too.

