couple ideas and a couple of questions.....I use the small plastic mixing cups that you buy at hobby stores and the cheap epoxy brushes. After I'm done, I wash and clean the cups and brush with lauquer thinner with a final rinse of acetone. Kinda of a pain but I get a lot of uses out of a pair of cups and a brush and saves me money.
I also put a drop or two of the lauquer thinner in my epoxy as I mix it to thin it out a bit. This allows me to do one or two more baits with each mix. You have to expierment and add literaly, with a eye dropper, a drop or two at a time. Too much and the epoxy gets too thin and doesn't work too well. Just add a drop or two as you mix it and check the consistancy.
Now a question, can you sand epoxy, say if you have to add another coat, without messing it up and have it turn out clear? The sand paper doesn't put marks etc on it, scratches? I would imagine you use light grit sandpaper?
Thanks and I hope this info helps