I'm going to be dying my kayak using Solar Lux dye, and wondered how much I need. I won't have use for the leftover, but don't want to find halfway through that I need more (and mix with reducer in the same quantities, try to match color between sessions, etc.). I know only a couple guys do this, but any advice on quantity would be appreciated. If it matters, I'll either be using the blood red or cordovan mahogany.