I've been using Auto Air for several years now. Thay are a great product, especially where the average artist does custom painting from their house. They are non toxic and have a very large color selection. As for the Bond-All and Catalyst, the main use for those is for the original base color to ensure a strong bond to the primer or sanded clear from a previous paint job. When used though, make sure you heat set the color with a hair dryer or heat gun for the BA and Cat. chemical bond to take affect. If possible, I still try to use a urethane (i.e. Dupont, HOK etc.) for my base coat because they are more durable. AutoAir is GREAT for mural work.