I painted my car with PPG paints - deltron DBC with DCU2021 clear about a year ago and the prices I paid here are pretty close to what you were quoted. I used the DP50lf epoxy as a seal coat . For comparrison---gallon DBC 395.00, gal clear 210.00, gal dp50 141.00. Hardeners and reducers were about the same price. I painted the engine bay, jambs ,and trunk/wheel wells, inside front fenders. Did not paint the floor or anything underneath and used 1 1/2 gallons of paint. The painter said he was down to the last drop of paint to finish it so you should have some left with 2 gal. I really like how it turned out with the PPG products.