Hey,
That looks EXACTLY like the problem I am having as we speak!!!!
Look at this pic,
http://www.caswellplating.com/bbs/al...php?pic_id=513
and tell me if it looks kinda like that?
I have also been scratching my head.....
I have been using dish soap in the water, (just a little) and it really seems to help. It seems I have to get new water more, but, sands better.
About the different finishes.....
I have been able to get a little better match with going over the Brown like, 10 times.... No black emery/sisal, just sanding, then brown/spiral...
I am using a Makita 2500RPM drill, and the Caswells 4" wheel.
I resanded more than once too, so, dont feel bad!
Hang in there