Sorry, I hit the wrong nail(use your hammer only on metal nails, not the finger ones) too many times to ever type well on a phone.
I thought I described the process.take your tool,(the metal one) and wipe a moderate coat of oil on it, then heat it up around the smoke point for a bit. An old tool catalog would describe this as a 'baked oil finish'. I'm sure you have seen it on a cast iron pan.
So its a rust resistant fairly durable coating. BLO you don't have to bake, it doesn't have much color, and smells bad in the shop while leaving the tool sticky for a day or few as it dries. So I baked it to speed things up, and each baking or layer gives more color. I went 375 for an hour pretty much at randomlet it cool in the oven, put another coat on, and rebaked.
The Barcalo was pretty dark to start(might have originaly been an oil finish), and I like how it came out. The SO punch I wirewheeled the taper and only got a little BLO on there with my greasy paw, you can see the spot. The Craftsman bar has pitting, and I am not a big enough fan to polish it. I might buff it a little to see what happens.
As jakemac mentions, BLO is an industrial product based on flax oil. Dont use it on food equipment, and cook it in a well vented(I use a sacrifial toaster oven outside) for food grade, use flax oil, its espensive, but has the highest burn point of any cooking oil with no heavy metal additives.