I have an '03A3 that the metal is in good condition but the stock had a VERY heavy coat of what appeared to be polyurethane. After about 3 weeks, I finally have that finish off and all of the oil that's going to come out, out. The only sanding I've done is a very light touch up to remove any "hairs" that have risen. I want to keep the stock markings and all of it's life's mishaps. I'm using pure tung oil and citrus solvent to finish it. My plan is to replenish what was used up from the mix with pure tung oil, reducing the solvent percentage as I go. I'm comfortable with this but am now wondering if the inside of the stock should be treated as well? My first thought was NO but in retrospect, would it not help with keeping rain, sleet and melting snow from saturating the wood on the inside of the barrel and receiver channel?
I know this has a simple solution but I keep going back and forth on it. What is the correct way to do it?