When I use antiques, I give them a light wipe with a damp cloth with saddle soap. That removes the build up from the high areas and leaves the antique in the crevices, tool marks, etc. The only way I have found to clear coat waterbased products without getting any smearing, splotching, diluting, etc. is to apply the clear with an air brush. Once you go air brush, you never go back to wiping on clear coat. You get nice thin and even coats with no smearing.