Very good question I should have weighed the plank but I didn’t. I couldn’t wait so I did sand part of the plank after about 6 hours with 320 dry and sanded off fine and smooth no problem.

Because I just can’t sit on my hands I am doing another plank this time I am thinning the product with denatured alcohol and rolling it on with a foam roller. That seems to work well in 45 minutes I will add a 2nd coat and wait and see.

This plank was sanded with 320 and its dry weight was 26 grams.