Home Forums Hunting & Shooting Gunsmithing What is going on at the wrist of my stock?

OP I would strip the stock and start over. I would pay particular attention to cleaning the area in question. Powdered chalk is available cheap on Amazon to make whiting paste, that will help draw out whatever is in the wood there.

Keep us posted please 👍

Partially refinishing a stock can be a crap shoot.
You may have to seal it with dome shellac sanding sealer.
You will want wax free, once that is done you can move on with whatever is your favorite.

My go to has been BOL, multiple coats, adding beeswax for the last few coats. If you use/add beeswax you will need to heat them up in order for them to mix.
Warming up the stock helps too. Which you can do with some vigorous rubbing!

I will usally wet sand the last few coats. I think 320 has worked well.

For [bleep] and giggles decided to try sanding those spots, wiping down with mineral spirits, and then reapplying the tung oil. While the results still aren't perfect they are 3 foot worthy, which is good enough for me. Letting those spots cure/dry and then I'll reunite the stock and metal

I agree with a post earlier that Silicon may very well be the culprit otherwise just oils. Worst thing for stocks, don't use anything with it to wipe down your guns if you are dealing with wood.
I have had best luck with Lacquer thinner and really soaking these areas good. Seems to pull oil out as well as help with the Silicon issue. As mentioned if humidity is high don't get in a hurry to put the next coat of Tung Oil on. I can do a True Oil stock farrrrrr quicker than a Tung Oil stock.
You may be best lightly sanding the entire stock leaving most of it with the grain filled. Hit these bad area very hard with thinner. Then start again.
Good luck.

Looks like a drippy wet heavy application to me. I do very thin coats (like 4 or 5 drops for an entire stock) and rub until it's nearly dry. Let cure for 4 or 5 days and repeat. Usually a dozen coats in before the finish shows any depth at all.

If sandpaper gums up, the finish is not cured.

Had a similar issue while using tru oil a few years ago, re: this isn't exclusive to tung oil or BLO. The stock just needed a spot of old oil cleaned out first that was preventing it from taking in the new finish... which of course I learned the hard way.