I bought a decoration from Petco that's a lovely little oriental bridge. Well, I just noticed that the paint is bubbling on it, so I pulled it out of the tank. It's bright red like my betta and he loves to weave in and out through the railings. Is there a safe paint I could use to refinish it? It's metal of some sort and I'd love to sand it down and refinish it rather than return it to the store.