i spray just about everything. por-15 goes a lot farther if you spray it. i use 2 coats. i like it cause it dries rock hard. even when my shop is cool. the next day its rock hard and it s hard as hell to get off. i mix different ratios of semi gloss black and silver to get the different types of metal finishes. the only down side is that it s shiny. but i figured thats an ok trade for durability. thanks for all the good words guys.