My 180g has the back of the tank painted black. In some area toward the bottom frame and the top frame, the paint chipped away. I wanted to touch up those areas but I'm not sure what to use. Home Depot only has Rustoleum, but I've read that alot of people us Krylon. Do I have to respray those areas? I was thinking of using a sponge type roller to apply it. Can I do that or should I spray it? If Rustoleum is the only thing available, which should I use there are so many types.