I recently found an almost - full, largish bottle of Scalecoat "Boxcar Red paint lurking in a box of junk.:headspin:junk. I want to use it to repaint most of my boxcars but I know that this requires some preparation. My research indicates that I need to thin it by about 30% with alcohol ( for airbrushing). Does that sound right? I remember in the past that it's pretty much useless to try and brush this stuff on, so I want to be sure I get it right. Thank you in advance! Bill.