: I just finished carving the bulk of my minicell seat, and was wondering what
: is the best method of smoothing the minicell foam to a finer texture.

I use 150 grit drywall sanding screens. They produce a vey smooth surface.

: What contact cement or velcro do you recommend?

I've been using Weldwood's new gel contact cement and it's much easier to handle than the liquid types. It spreads easier and stays where you put it. As far as I can tell, it's just as strong.