Well I am working on doing a viv as profesionally as possible, I took the entire tank apart except for the glass and resealed all the joints and cleaned it up to spotless. However the tank is old, and a very non-standard size, and upon inspection of the screen top (which is vital at the moment for my project), I noticed that the metal was exposed and almost completely rusted . How can I clean this up and reseal it? I tried removing the screen, so that I could replace it, and it was literally melted into the frame. THanks for the help!