Here's a thought,
I was a furniture maker for many years and while I mostly made new pieces, I would occasionally refinish a piece for a special customer.
The interesting thing is that I never used stripper; too messy, toxic, blotchy and costly. Instead I used a variety of cabinet scrapers that, when used properly, would remove just the finish, leaving the wood clear underneath. My scrappers usually consisted of one square hand held cabinet scraper and several old pocket knives with different shaped blades. With them I could remove the finish on a dining table in less then 30 minutes.
Add a light careful sanding with 220 - 320 grit paper and I was ready to reapply the stain. Srippers damage the wood, the wood grain, and the way that wood takes stain. As many will show you, you can still get a great end product, but it takes a lot more time and effort.
And finally, you probably need to use wood bleach to even the blotchyness you have left on you gun. If you are down to the wood and still see light and dark areas, no amount of sanding will work. You will need some bleach.
Just a thought :hmm: