Most of the epoxy manufacturers sell pumps that are graduated so that you get the right mix each time. They can stay right on the cans/bottles with no ill effects during storage. I believe the ones from westsystem can be adjusted depending on which tube you install for different ratios. They're well worth the investment. They're neater to use, less fuss, and remove the thinking aspect from mixing-always a benefit. (g)
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.