Don,

The catalyist is the same that's used in fiberglass resin - the clear liquid that comes in a little tube. There's only 0.75 oz per quart, so it would be pretty hard to adjust. The instructions say to use acetone (up to 10%) to increase flow-out and pot life. I don't think there's a problem with the drying time, because it takes about 50 minutes to dry to the touch.

Somehow, I'm just not getting it properly atomized coming out of the gun. Maybe the gun is just not adjustable enough. I'll just sand the orange peel out of it. I'm certainly not going to try to use my BB/CC gun to try to spray more primer.