First its a preference thing I guess.
We have to address some things though from my standpoint at least.
First I know what a PITA stock finishing can be and how people will hang on to something they can make work.
Then.
What are the advantages.
What are the disadvantages.
Since its impossible to seal a wooden stock and make it stable the argument for waterproofing is not valid. If it were possible to waterproof gunstocks and keep them stable the modern trend of plastic stocks would not exist at least not the the extent it does.
Wood will always breath and to will always be relatively unstable.
So we have to ask what IS the reasoning?
Easier to use, not really, probably the opposite for a decent finish, makes the stock look better, no. Less harmful to the stock finisher, no. Solvents are bad news in all respects. The high solvent content means 1/2 of the material applied evaporates. So its slow to fill the pores of the stock this is why they sell "fillers" for walnut to overcome the shortcomings of the finishes they sell. Every modern varnish has about 40-60% volatiles. Plastic, tung oil etc etc all the same it seems.
The reason for using it comes, for the most part, from the desire of someone selling the stuff to sell the stuff. How suitable it REALLY is matters not at all.
A good finish that anyone can make in his own shop for a fraction of what the factory mades cost by the ounce is not what is needed, buy the varnish sellers anyway.
The side benefits of a real oil/oil varnish is that its traditional, if made right its easy to use. Dries pretty good. Looks good on or in the wood. Since its heavier bodied it finishes in less time than the thin stuff does. This I KNOW.
The thing that really surprises me is that people will go to great lengths to laboriously make springs from old truck springs, gravers from old files, agonize over the preparation of the wood. Should it be scraped or sanded? How smooth should the carving background be? Do we smooth it too much? Do we over polish trigger guards and barrels? Should we leave file marks on the lock? Then after all this nit picking they will stain with something that is synthetic, possibly not totally color fast, requires 3-4 coats of different colors to get it "right" when traditional is easy to use, solvent free, safe, color fast and produces the right color to boot.
Then they order some solvent laden synthetic finish that has no advantage over the traditional finish. In fact they can BUY pretty good finishes that are almost all oil. Chambers, which a knowledgeable friend called me about today having tried it, seems to be pretty good. I have read pretty good reports of Tried and True Oil Varnish and it reads pretty good, being, it seems much like the old gunstock varnish.
Neither seem to be loaded with solvents. Both are mostly oil. Whats not to like?
Except they probably will not work like varathane or a host of other lumber yard made for the lowest common denominator consumer refinishing his interior trim or a coffee table which is what a lot of this stuff is mildly disguised or not. But its what people are used to I guess.
I will try to get some info on the crackle finish report might take some phone calls.
I still wish someone would do the back yard test...
Preference?
After using a lot of solvent laden varnish on stocks I prefer oil based stock finish rather than Stoddard Solvent or similar bases. I don't have to put a fan in the window when using linseed oil based finishes.
Dan