I've got a couple old M-14 mags that I lucked out and picked up at a surplus store for $15 apiece. -If- you can find them elsewhere, normal prices are $25 to $55 per mag depending on the source. On top of that they're 20-rounders, and when you live in a high-cap ban state and can't buy new mags even if you wanted to...
To dive away from the political argument...Being surplus mags, they're worn and beat and I'd love to get them looking like the one mag I got new with the rifle. On top of the worn appearance, they've got issues with feeding ammo, but that's a follower/spring problem that's solved by replacement parts for $15 a mag. So. To finally get to my question.
Does anyone have experience with parkerizing steel? I live in an apartment, so the preference is to send the mag bodies off to a company who does good work, even if it's going to cost a few extra bucks compared to me doing a slapdash job on the cheap.
There's three ways to do it: One, you pick up all the materials and brew up a DIY formula. Two, buy premade/premixed chemicals and follow the instructions. And three, send 'em off to a professional shop.
I would only recommend the first one if you're the DIY type that wants to say you did it yourself. It's not any particularly huge savings over the other methods, and can be rife with problems- if you look around, you'll find any number of stories about people ruining parts, or even just not being able to get good results.
The second one is a lot easier, and can be cheaper than sending it off to a pro, although when it's all said and done, not by a great deal. Living in an apartment, keep in mind the process smells a bit, and involves weak acids.
I'd recommend sending them off to a shop. I can't recommend one, as I've never had anything Parkerized myself. Find a local gun store and/or gunsmith and ask their recommendation, or if you live in a big enough city, check Google, or even the Yellow Pages, to see if there's somebody local.
A fourth tangent option is see if anyone locally does Cerakoting, or one of the variations like Durabake or Ceramacoating. I know that Cera has colors available that look very much like Parkerizing, and you might be able to find a local shop that can do that for you inexpensively.