I have refinished and restored many stocks. My technique is exactly the opposite of cash's. It requires a very hot iron and a very wet rag to generate enough heat to lift the dent. Repeat as needed ... and several repeats are usually required. The finish will be lifted. That's a given. If it's acrylic or urethane, you will have trouble patching it up. May as well strip and refinish the entire stock.
Yesterday I finished stripping, restoring, and refinishing this stock.
View attachment 600542
In the final stages of rubbing out the last coat of oil finish, the stock got away and fell off my Gun Butler cradle with fore end striking hard on the edge of finish lid jar underneath. Crap! Left a nasty dent in the perfect checkering. Not something I can sand out. No choice. I had to strip the oil finish from that spot and try to steam the dent out. It required several attempts but finally the dent was barely visible. Actually, the dent was gone. What remained was broken grain in the wood which often retains the appearance of the dent even though surface is flush. Optical illusion. I lightly brushed the naked wood with fine steel wool and then used an artist paintbrush to touch up the bare spot in checkering with oil finish. I use my finger to rub in the oil finish on flat surfaces, then after about forty minutes I rub out that coat with paper towels. Checkering is different. The rest of the stock can take up to a dozen coats rubbed out before grain is filled. Meantime the checkering remains untouched and stripped. It gets only one coat when the rest is done. Anyway, here is the section of fore end checkering that was repaired. Can you see the dent?
View attachment 600543