Latex or any oil based paint works fine as does most any rattle can spray paints. I have s0me painted with latex, others with oil based enamels and others with varous spray paints from rattle cans and all of them seem to last ok. Flat seems to cover better and not get whats called fisheyes in the process, so if I have flat available I coat it first with a coat of flat and follow up with gloss or semi gloss as it makes clean up much easier. Matters not what paint you use, its all easily removed with a razor scraper if you change your mind later on........Biggest problem with the typical background materials sold is if it gets wet between it and the tank you get salt and calcium marks, which does not occur if its painted.