by erzats » Fri Dec 11, 2009 5:59 pm
Let me throw out that what I'm telling you is based on my limited experience (glassed 2 boards with epoxy) and what I've read on swaylocks...
you can do it by volume, just make sure you get the ratio right. For example, most epoxies are 2:1 by weight, but because the densities are different, the volumes will be something slightly different than 2:1. It will pay to do some research on this. Some epoxies are corrected for this, like Resin Research.
I think plastic containers are okay, just make sure they are clean. To be sure, use denatured alcohol. Never ever ever use acetone with epoxy. Acetone will take the stuff right into your blood stream, which gives a fair number of people allergic reactions.
I have found that not all epoxies are the same. I have used resin research and really like it. On my first board I ran out of resin research epoxy and switched to West Systems for the hot coat and it yellowed in the sun within a week. Luckily, my board was in a yellow resin tint, so it didn't look too bad (but you can see a permanent imprint of where the tie down straps were!). The newer resin research has even better whiteners and UV stability. So far my clear glassed board still looks snow white. I'm going to guess that Ding All uses whatever epoxy they can get their hands on cheaply enough. As far as I know, this isn't a problem structurally. But it might look worse than you wanted it too.
60 should be fine. The nice thing about epoxy is that it will kick if the ratio is right, but it may take a while. Dial it in, do the repair, and ignore it for 24 hours. You should be good to go.