Issues and troubleshooting: taping and epoxying the butt seams

So we ran into a few issues during the first section. Here's how we dealt with them (with the advice of the awesome Pygmy people):

• The first I would say is just that my first seams were really messy. I had some bubbles/small sections that weren't covered with epoxy, the corners of the tape weren't completely clean and peeled up on a couple seams, and I also didn't clean the epoxy very well off of the face of the panel. The little bubbles and small uncovered sections were okay to leave and will get filled in when we epoxy and glass the whole boat. The little non-epoxied corners of tape I just cut off with a razor knife and the space left will get filled in later. The epoxy that wasn't cleaned well on the faces just had to be filed and sanded a lot to get it smooth.
• The epoxy on Kelly's second set of seams didn't cure correctly (meaning it never hardened). We still don't really know why. I think that it was because she reused the mixing cup which we earlier tried to clean with acetone. I think there was still acetone residue in the cup that got mixed with the epoxy and caused it to never cure fully. She had to use lacquer thinner (you can use acetone on the plastic tools but not on wood, for wood you need lacquer thinner) to get as much of the epoxy off the panels as possible. Then she sanded the rest off until it was back to wood. This wasn't too hard and didn't take too long. We have been using new cups and stirring sticks every time and haven't had that problem again.
• On one of my seams the 2x4 ended up partially on the panel and got glued to it. I had to rip it off and some of the first ply of the panel came with it. I filled it with a little bit of epoxy to try and even it back out with sand paper later.