i just got me a gallon of professional, but when i used the "stops rust" at work for customers items (previously welder), we used japan drier (made it dry in like a 1/4 of time it would normally take to dry. my question is, have any of you used that with the professional grade? its only $5 at home depot. i ask this because it is great for cold weather painting, and well, ITS COLD! but i wanna paint! also home depot only had hunter green, gloss black, white, red, and yellow; but i need blue for another car im painting.