I should have taken before and after pictures but I didn’t. I turned a small hollow form and must have bumped it against something because it had two linear dents about 1 cm long, too deep to sand without leaving a depression. So I googled and read about steaming out a wood dent. The articles used an iron on flooring. Instead, I dampened a small piece of t-shirt in water and applied my heat gun. Did it a couple times. T-shirt and wood got pretty hot. As the wood dried, the dents virtually disappeared. A little sanding now and all will be fine.