I prefer tung oil too, as I like how it makes a harder coat, that seems like it would seal the wood better againg grunge and the elements compared to just using BLO.Also, I never got the nack of rubbing in the BLO like its supposed to be to get it to really look nice like most others can (I was never able to get that incredible super mirror finish in my boots in the Navy like others either, no matter what I did, even doing exactly like people told me).Apparently I'm defective.With tung oil though, I was always able to get it looking really nice, really easily.I will say that tung oil, every time I used it, did seem to take a couple days at least to dry enough to not feel at all tacky, even keeping it indoors with low humidity and around 68-70 degrees.
So, since I never got the knack of BLO, but tried it almost every time to see if I could get it to come out right, most of mine ended up being tung over BLO, and I never saw it have any negative or unusual/undesireable effect compared to ones I did later wher I used just the tung oil.
As for the combustion thing, I always assumed both were bad news on used rags, so they were burned in the BBQ whenever I was done for the day.Better safe than sorry IMHO.Getting new rags is cheap, replacing everything I own from a fire is not....