Only for "ULTRA" fine scratches or scuffs. Don't bother filling ANYTHING that is deeper than that with this stuff. That's all galzing is ... very fine filling. If you take the chance on filling anyhting really deep with it, you will have to do it in layers, making sure it dries fully (air at room temp) before adding the next, ect. ect.
If you're concerned about wasting, just go get a single can of Bondo "Ultimate". It's blue when mixed. 9.5 oz. Better than the run of the mill pink bondo, easier to sand, feathers better. Sticks to ANYTHING ! Only about 12 bucks at Wal-Mart.
FP