For small dings and dents I have had good results with a wet rag and a hot steam iron. As long as the grain has not been cut this has worked for me. You may have to have to do it a few times to get deeper dents out. A light sanding afterwards to tidy everything up before the final finishing.
If the finish is not cracked, could be a problem, the steam/ water has to get to the wood fibers.
I have never had much luck with this, some guys say it works good.
What you try to do is force the steam in the dint and the water will expand the wood fibers.
Good luck
I've had good luck steaming out shallow dents with a 2x2" wet rag and a spoon heated on the stove.
The grain is not cut just crushed in, Citori 20 ga fore arm .I took a fall on Monday while grouse hunting . the finish is not ever broken, crushed area is 1"L 1/4"W and 1/32" or so deep . the fore end also now has a hair line crack running in about an 1 1/4" in on the tip .I don't think I can even open it enough to glue any thoughts on this as well .