scrubking: It's a horrible perk that is completely useless.
Archonsod: Not really. The junk is useless as it is; you can sell it for a couple of ennies, but you get far more simply crafting a basic pistol and selling that (particularly if you get the perk to increase the sell value of crafted items).
As a bonus you get XP every time you scrap something and craft something.
You can scrap pretty much everything, even alcohol and snacks, which in return will give you upgrade parts that can be sold for considerably more money and of course used to upgrade stuff. I highly suggest scrapping anything that is worth less than 8 Eddies, usually the parts you gain are worth a lot more.