Recently Fallow posted video on how they made demi glace. Bit specialized ingredients probably if you ordered far enough from butcher doable. Bigger issue was the larger scale and time effort.

I really feel main difference is the scale and then getting right ingredients and then actually using all of them. Later making thing somewhat cost effective.

I have no doubt any serious company couldn't make something like WD-40. Not exactly same stuff, but in general close enough. Probably close enough that if you labeled over nearly all users would not notice.