Deep dents require a different method of going about things though a little more complicated than removal of shallow dents. The method I use for deep dents is an old school long forgotten trick used by a French polisher who passed information on to a young man in the 1960s and I have never found a better method. This method is best used first on a deep dent's though I have used it when the water and Alcohol have worked so far but not removed the dent all the way. Neat Alcohol will work but it is far better if there is a water content with it so I use 50 50 water and Alcohol up to 75% Alcohol and 25% water. The reasoning behind this is wood needs water to swell the fibers where Alcohol will just provide a vapor quickly to expand the wood fibers at the time then disappears allowing the fibers to partly return to their starting point.
The how! First remove any finish from the dent and surrounding area also try to remove any oil from the area with Acetone or Petrol yes Petrol well this is old school. now you will need the finest sewing machine needle the finest you can obtain because these will stand the next step. You are going to use the needle to pierce deeply the surface of the dent using a very light hammer and gentle taps on the needle remember you are not knocking in a nail do it gently (I always try to pick the wood pores because it is far less noticeable when you com to finish because not all the holes will disappear but the majority will. Next you will need a piece of bread and moisten it with a little water to make a form of putty, now using this putty form a dam around the dent which is intended to hold the alcohol water mix. The final step is to heat the dent and a little of the surrounding area as hot as you dare now pour quickly into your dam the water Alcohol mix. As the wood cools down it will draw the Alcohol and water mix deeper in to the wood fibers via the holes. When cool you can repeat this process hopefully saturating all of the wood fibers in the dented area, then suing a hot iron and a cloth saturated with the water and Alcohol mix heat the dented area though keep your nerve doing this final step because you need to heat the wood further down than normal. you can repeat this process many times until you obtain the best results. During the final stage of steaming you will find a lot of the needle holes will close themselves.


The only lessons in my life I truly did learn from where the ones I paid for!