Everybody probably knows this, but WAL-MART have moderately useful mini paint brushes, as for models, 30 for $1.00, in craft section.I use rustoleum with a little mineral spirit thinner (makes it flow smoother). Gloss black, semi gloss black, flat black, similar to car, aluminum similar to later silver but not the same,($9.00 a quart) 2 versions of spray zinc rich galvanizing, one brighter than other, also similar to silver, useful in rusty sections,