Flat brackets that are not galvanized are hard to find. Galvanized metal sucks for painting. Stainless steel is slightly better but still had to use a primer to etch. You'll also need to paint some flat L brackets. Could find a plain steel for it! Takes the usual primer and paint much better. They were advertised as being weldable. I would have preferred regular steel for the T-brackets, but it's very hard to find and usually overpriced.