Yeah...I had the same problem. Personally, I don't think the "polishing compound" and orbital buffer are strong enough to take out the scratches from the wetsanding...

Here's what worked for me

a.) wetsand up to the 1500 as described in this post
b.) apply "rubbing" compound and buff off with a high-speed buffer using wool pads w/water
c.) apply "polishing" compound and buff off with a high-speed buffer using foam-type pad w/water
d.) polish with high quality wax.

It's worked wonders for me...I can take pictures if needed. Chuck