With the threadmaster stuff, the biggest difference is going to be pot life (amount of time the finish will apply correctly) and cure time. If you're turning the rod by hand, you're going to find the high build will set up quicker and you don't have to turn as long, but you won't have as much working time. You may have to mix two batches to finish a whole rod. Don't push your pot life, once it starts to get gooey, your finish will suffer.
If you've got a motorized dryer, you can use the lite build, which will give you a lot more time to work but will take longer to set, as well. I've used most of the popular finishes but mostly just use Bullards D2 anymore.
Oh, and you'll find a lot of that fly tying stuff can come in handy when you're building, too.
Last edited by mriddell; 02-20-2014 at 10:30 PM.