That is correct 2 part urethane. I use the same reducer as I would for the PPG Concept paints. I can't remember the "model number." I don't know that the paint comes in larger quantities. If color matching (of comp-arf colors) is not an issue an automotive paint jobber can scan monokote/ultracote colors and mix the colors. Radio South paints can be ordered using the film covering names and you can order by the ounce instead of having to purchase by the half or whole pint. I have painted a couple of Impacts with PPG Concept and am about to do an Integral. The colors were purchased from RS. The white from comparf is good for touching up seams. The second time I purchased paint from RS I only got the colors. The activator and reducers I purchased locally.

Speaking of covering seams what techniques do you use for the painting and feathering/rubbing out part of the seams. It's something I still struggle with.

Good Luck!
Tom