OK, so here are my results. Since this is my first resin model, I'm asking questions and taking advice.
Maybe another noob has the same question, so it may help someone. If nothing else, I'll keep the thread alive!
I appreciate the responses and the time from the veterans and Mike himself!
The resin "pad" under the part is about the thickness of a nickle.
I rotated the part, face up on the belt sander feed table to remove most of the edge.
Next, I GENTLY held the back against the belt to remove the majority of the remaining pad.
There was a TINY gap under one edge of the part - I used this to gauge a little more light sanding on the belt sander.
Finally, I cleaned up the whole part with 1000 grit, jeweler's files inside the "teeth" and a 5/16" drill bit through the center.
All together, about 10 minutes.
Probably overkill for something that's mostly hidden, but I want this model to look PROFESSIONAL.
PLUS, I'm having FUN.
Does this make the grade?