Many people use many different products to pore fill and seal, but I wanted a clear filler that would not alter the natural color and beauty of the rosewood, so I chose to use clear 5-minute epoxy. Essentially, you just spread it as thinly as you can with a credit card, let cure, sand with 320, and repeat.
I usually broke the guitar into sections--back separate from the sides and top-- since my epoxy cured a little quicker than I could work. One time I completely blew the mixture ratio and my luxurious 5 minute epoxy became 30 second epoxy...no worries though, I just let it dry and sanded off the ridiculous looking job I had done and started over--it's fairly forgiving if you're patient.
Here are some photos of the sealed body with the crazy cool rosewood--this Amazon Rosewood actually has a lot of depth for a rosewood. I've left the final coat of epoxy rough and unsanded--it'll remain that way for a couple months while I build the neck and bridge, then I'll come back, sand it down, and begin applying a dozen coats of finish lacquer.
