might be a little much, if your building onto a door and plan to blend it in then it probably really wont be all that much extra left over. plan on what 2 or 3 layers?
some people are a little heavy handed on the resin...you could get away with less than a quart realistically. You can buy it by the quart at a bunch of places for $10-15
no these will be tiny with wood backing.. I am going to try something different and do it behind the door cover.. mainly because they look tacky unless done VERY well
anyone think there will be a problem with putting some of the enclosure through the speaker hole and the rest of it out of the hole to the side? using the hole to gain more space..