Need advice for fast filler before applying fiberglass/epoxy.

I’ve got to lay some fiberglass today to stay on schedule. Unfortunately I’ve got some small dings, etc, under the surface that need to be patched.

Are there any fillers or anything that I can put on that I can sand and lay fiberglass over on the same day? I’ve got some TotalBoat total fair, but it says to wait 24 hours before fiberglassing.