Bob,
I got my Novus kit today. I took a scrap peice of canopy and purposely put some debonder on part of it. I was able to get it looking better but certainly not to an acceptable level of appearance. Next I will try to sand as you mentioned. I take it you were able to get a fully restored look with sanding followed by Novus without the need for a clear coat paint application. I would like to avoid the clear coat if I can.