Runs!? Rubbing through!? You are working this finish WAY TOO HARD! Each coat should be rubbed into the grain, then left to dry. If you are doing it right and the heat and humidity is right, you can possibly recoat in about 10hrs. If you put it on thick, you will have all the problems you are having now and it will take forever to dry the way you want. IMHO, you are using my favorite finish and I have been around the horn with other finishes as well. It is just learning how to do it. I don't know what a run in the finish is, on properly applied finish. As far as sanding, I don't do that until a get around 5-7 coats, and then the purpose is to level the finish with the grain, not to try to remove it. I scuff it again after approx. an additional 2-3 more coats. Now I am starting to head toward the final finish and I am apply some light coats with very light scuffing between the coats always looking for just the area that needs more attention than the rest of the stock. For me, depending on the porosity of the wood and the my pickiness, it may have as many as 13-15 coats. The finish is the showing off of all your work. For my habits, I also am thinning the finish some as well, with a little bit of Japan drier in it. I have a small bowl that would used on the kitchen table for something like sauce for shrimp as a bowl to dip my fingers into to rub on to the stock. In that bowl, which is maybe about 2 1/2" dia. I will place about 1/4" at most in it and then maybe about 1/2 that amount of turpentine with about 3-4 drops of Japan drier in it. Of course this is all well mixed together. I have no idea anymore how many guns I have done this with after running the route of BLO and tung oil. These finishes are in a thing in my past, not ones I will use again.