Jon Hosford sells a dent raising kit at the Southern SxS in Sanford. I expect he'll be returning with Kirby Hoyt this April. Jon was raising dents, while you wait, to demonstrate how his product works.
If you can make it to the Southern at Deep River, that is an option.
I bought a dent raising kit from Jon at the Vintage Cup. I haven't used it on my "training SxS barrels" so cannot help at this time.
I have half a dozen SxS with crappy bores, dents and worse. I started honing out pits to see how much metal removal it took for the big pits, then it was browning practice, last are the dented barrels.
Joe
Charlotte