My only experience with veg oil is from people trying to use it as a lubricant in the food industry on meat slicers. It turns to gummy mess, then hard as heck not to mention the rancid smell. Hope you have better luck than that. I use any of the leather products traditionally used, Neets foot oil ,mink oil, sno seal, etc. Never had a problem most oils will darken your leather that I have used. There is a new post from someone who tested a bunch of products, seems to be good info.