I am now at the half way point on my Fett helmet (ESB style) and wanted to post some of what I have learned so far to share with others, as I have found all of the info you guys post from working on your helmet and armor EXTREAMLY helpful.
First off I used a ModelMasters silver paint as base after a light primer... worked like a charm... I used clear colorless masking fluid for the main large and medium scratches and used a special blue masking tape for masking fine lines. It appears to work well and not stick to the paint.
I did let the silver cure for two days and gave my helmet a good bath between every coat of paint... keeping it clean and free of dust. This also helps the colors stick to the silver. It gets a light dust residue on it when it dries so a simple light scrub down with a lint free cloth did the trick there.
I will post later tonight with the type of dremel tool I found at home depot that made easy work out of the keyholes! I could not believe how easy it was with this tool. It has a specific code or name so I will post that and share so all of you can utilize this.
I will also post pics of my progress! :thumbup