Kerr Avon
Master Member
Alclad makes a water based clear coat which will help protect it and not dull it. I've been trying to work with Alclad for a few weeks now and have had some mixed successes. But yeah, as an option it wouldn't be great for a costuming helmet because the paint will get scratched pretty easily. Your best bet for a costuming piece would be vacuum plating to keep it light and cheaper.