Hi to all,
I use to use a lot of epoxy glue and here is the best way I found to mix. Take a post-it or any 3" to 4" square piece of paper. Take a 2" wide piece of Poly tape (packaging tape) and lay a piece across the paper. Now mix on top of the tape and it won't soak into the paper. You can use two pieces of tape side by side with a little over lap. After it dries you can pop any unused epoxy right off the tape. If you need to mix more than just a dab, you can use a small poly cup. Again, the unused dried epoxy will pop right out of the cup.