plating, anodizing, & finishing Q&As since 1989
Coating brass bullets and casings to prevent tarnishing
January 23, 2012
Q. Coating of brass jacketed bullets & casings to keep them from tarnishing? Does anyone know of a way to prevent tarnishing of brass when worn against the body's skin such as in a brass necklace with a bullet pendant?
Need a product that I can dip bullet pendants and have them dry within 10-20 minutes to keep them from tarnishing when coming in contact with skin acids & oils.
Thanks very much,
lacquering brass metal objects - Tavares, Florida
January 24, 2012
Hi David. Are you selling these items made-to-order at a souvenir stand?
The reason I ask is to find out if you actually desperately need a 10-minute curing time -- because that is the main problem. Brass does not stand up to contact like this, and does in fact require a good lacquer or clearcoat or clear powdercoat, and there are a number of them that might be appropriate for your application. Many require multiple coats for best performance. So, if this is a production-in-advance process, rather than a made-to-order while-you-wait application, perhaps some way should be found to eliminate that 10-minute curing restriction so you can employ a top-quality coating and/or multiple coats. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey