Hi, I have a few questions about mixing small portions. According to the instructions half a quart is 2 cups of part A, 1 cup of part B and 1/4 cup of alcohol for the 1st coat and 1/8 for the second coat. Would I just divide these measurements in half to make a smaller portion? I dont want to make a mistake. Also for people who have used this stuff have you experienced the finish to have small bumps? I think it could be from the paint roller that i used but im not sure. I experienced this problem with the white pond shield but not the black. Any thoughts or ideas would be great!