It's time to get back to work in the real world. Here is a Mosrite body, almost completely recovered from its brush with water-based polyurethane. Stick with oil-based, water-based is junk.
This one went through a long and torturous build process over almost two years. All I can say is don't believe the "advice" you find on talk_ass. However, in the end, it turned out to be a pretty nice instrument.
Laying out the parts to see what it will look like. The body has been finished for a long time. Yesterday I encased the neck in plastic - 4 layers of polyurethane, wet-on-wet. Today I smoothed it out with 320 sandpaper, a gentle touch to remove any remaining wood grain and give a good surface for the final topcoat. It will need a few days to fully cure before then.