The epoxy will fill the sanding scratches. 40 grit on a stiff block is pretty effective at knocking off drips.

The stretching of bias cut tape can make it a little sloppy to deal with, but if you are careful it shouldn't be a big deal

: I've glassed in my inside seam, and am about to do the outside...
: unfortunately I was sloppy in some of my epoxying, and need to sand down
: some drips in the area first. How fine do I have to sand it so that the
: scratches aren't buried in there? Will the epoxy fill in scratchs from an
: 80 grit? Or do I have to sand to a wet 400?
: Also, what's the big deal if a biaxial tape gets a little stretched along the
: way?

: Thanks in advance,
: Mike