You could probably get away with one gallon of clear, it would give you 2 coats. When i clear a car i put on 4 or 5 coats, so i use about 2 gallons of clear, maybe a little more. I know alot of guys have talked about Transtar clear, but i have heard to many horror stories about it. Like chalking out or dieback or the clear hazing. I have never used the stuff myself, just heard stories. I have used Shopline and Omni clear, and that seems to work ok if your looking to save a few bucks. My feeling is it's your car, do what you want. I just know what works for me, and it works well.
