Re: Question about cotton steam and solder gun method of repairing wood dents.
I've done this with a guitar once before, but many times with furniture. Once you start oiling again, this trick doesn't work as well as it seals the wood and doesn't let the steam penetrate. There are times I've had to do it 2-3 times to get my desired result. With some patience, I've managed to get some marks out 100%. With a Trem dent...I doubt it, but if you do it a couple of times, it does get better.
When you are happy with the result, I'd still give it a couple of days to dry out before oiling it or it will trap the moisture in the wood and can give you dark spots.
Cheers and good luck!