Dave, I never thought of the waterproofing aspect, but you are right. Funny you should mention the nice look until upholstery happens. I had exactly the same thought today, maybe I will drive it sans upholstery for a while and the solid color will at least look better.

I really liked the Duplicolor Truck Bed Liner I got. It brushed on quick and easy and didn't dry like some of the liners I have seen that are like sandpaper. This stuff is pretty smooth.

Don