One note ... 206 does not have a lot of odor to it. 207 on the other hand has a very strong odor and unless you can handle the smell, it may not be appropriate. 206 is harder to sand as it is meant for laminating. 207 sands easily as it is primarily meant for finishing.

206 or 207 actually do work well for skinning wings if you can get the work done in time. Batching and getting it into "thin film" is the key to having enough time for skinning wings. Mix a pump (about an ounce) and spread it on the skins. When you need more, mix another ounce, and continue. Do this until you have all of the parts ready.

Batching like this is something you can do with laminating epoxies that you can't do with the hobby store variety. You can't batch Bob Smith 30 Minute epoxy like this. I don't know about their 2 hour epoxy.