Green Garapa (new boards with mold?)
I started my deck last year, and purchased over 1000 lf of Garapa decking, which has been stored in my garage since last spring. The boards look fine, with a nice color in the stack. I wanted to do the EFC-38/Citralic/TWP steps before installation, so took my first group of boards (16) outside today. They looked fine in the sun, though I could see a few green spots on several boards when I sprayed with EFC (3 oz/gal). I used a deck brush to agitate, as I don't have a pressure sprayer. I then washed off with a garden hose.
I took a break for lunch and went back to apply the Citralic, and to my dismay, most of the dried boards now had a green tint to them -- I assume from mold. I went ahead and sprayed the boards, brushed, and hosed off. They looked pretty good wet. Now that they have dried, the green hue seems to be gone.
I am still concerned that the mold may still be in the wood, and if I apply TWP, it will be that much harder to get it out later. Do I need to do EFC in a higher concentration and leave on longer? Do I need something else? How should I proceed with the 16 boards I have already done, and all the ones I have yet to do?
(I am in Michigan, if knowing my climate helps in your answers.)