I am gathering materials to begin learning wet plate this summer. All my LF camera backs are hand made with some aluminum components as well as a Kodak Commercial View 8x10 that is made of magnesium. The aluminum is powder coated. I understand that no matter how carefull one is, silver nitrate will get on the camera and holders. Will the silver nitrate react in an adverse way if it comes into contact with non-coated aluminum or magnesium? If aluminum presents a problem, I'll make a wood back. If that is the case, any ideas as to what is the best sealer/overcoat for the wood with wet plate use in mind? Thanks for any and all answers in advance.