"jeffc" wrote in message

Oh for crissakes people. No 2 "gallons" of colored paint contain the same
amount of paint. The base paint takes a certain volume. They have to
leave room for adding colorant in the store to make any color you want.

No so. I just looked at two cans of Pittsburgh paints. One was a pre
colored paint the it is clearly marked "one gallon" while the base for
tinting is marked 3 15/16 quarts. Another brand is plainly 1 gallon also.

If the OP bought a pre colored paint, he is screwed, If it was in fact a
base for tinting, there may be some legitimacy, but it still seems like a
lot of room for tinting.