I saw on this board, or maybe another, a technique to remove dents from balsa.. anyone know what it is?

White vinegar. You can use other types of vinegar, but they will stain the wood.

Plain ole' heated, vaporized H2O (steam).

Wet the dent and see if it comes up. For a stronger effect apply a covering iron the the damp site.

Dave Segal

I wet the area with water,then go over it with a iron,usually one treatment is all that's needed,but after the third time any dent left I'll use a filler then sand smooth.

I'm really not a wood worker as far as building homes and furniture.
But I have built up well over a hundred rifle stocks and repared dents for others who dropped them.I also built many canoes and kayaks.
Steam is your best friend when it comes to sucking out dents..
Sometimes a good soaking in very hot water and letting it dry will work out the deeper dents.
GL

Well, I did not have any viniger in the house, so I tried a little water with my cover iron, and am was totally amazed. Actually, I was so impressed at how it worked, I went around onto every piece and got everything I could out. What a great suggestion! Thanks guys!!