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Old 02-24-2005, 02:23 PM   #1
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Join Date: Jan 2003
Location: NW Florida
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I'd seen a couple of posts by members JAS & Hitzy in the Garand forum talking about the Radocy zinc phosphate parkerizing solution & showing really great looking results, so I ordered a bottle last week. It arrived this past Tuesday.

I have a couple of spare M1 Carbine bolts with a lot of finish wear that I'd cold blued a while back (experimenting). It worked pretty well, but I had doubts as to how well the finish would wear. I decided to strip & repark two of those bolts as a test.

Used Muriatic acid to strip the old finish. Took @ 3 minutes in the acid & scrubbing with a nylon brush to get it all off. Followed this with a rinse in cold water.

I set up my parking gear (stainless steel pot on a hot plate w/a cooking thermometer) on the back porch to make sure fumes from the process wouldn't harm me or the kitchen. Don't need the wife getting involved in this...

Directions on the Radocy solution say 1oz. per quart of water, & temp. between 160 & 180 F. for 15-20 minutes. I probably used a little over an ounce of solution in 1 quart of water, and maintained a temp of 200. I parked the bolts until they stopped bubbling, it was right at 20 minutes in the solution.

Rinse with cold water to stop the reaction then a nice long dip in some light motor oil followed by a scrub with steel wool to smooth the finish down.


I got a uniformly black heavy "crystalline" looking park finish, very nice indeed. The instructions said it should be a medium gray. Maybe the dip in the muriatic acid made the difference? Isn't that what Brownell's sells as a "pre-dip blackener" for use with their park solution? It's just a couple of bucks for a gallon bottle at Lowe's.

At any rate, for a 1st time parkerizing experience, this was just fantastic. I'm really pleased with the result & the easy process. I have some en bloc clips & assorted small parts to do next...
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Old 02-25-2005, 04:14 PM   #2
Join Date: Oct 2003
Posts: 745
Where can I find a stainless steel tank long enough for a barreled reciever?

Quag, can you post a list of the parts you used, the source, and price? That would be nice for us shadetree gunsmiths having a shopping list to go by.

Also, not to sound like a complete moron, with what did you suspend the parts in the solution?
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Old 02-25-2005, 07:23 PM   #3
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Posts: 6,793 will sell you a stainless steel tank large enough for a barrelled action. I imagine that Brownell's sells them too.

I got the Radocy parkerizing solution from Radocy's website.

I don't have a bead blaster, so I used muriatic acid. ~ $2.00 per gallon at Lowes. I think a bead blaster would give a better appearance when doing a receiver or barrelled action. Look how nice JAS's work is.

I bought a cheap hotplate, bi-metal cooking thermometer, nylon scrubbing brush & stainless steel pot from Walmart. That's it.

If I'd been thinking ahead, I'd have borrowed some stainless steel safety wire from work to suspend the parts in the solution. As it was, I just used some stainless steel tongs to roll the parts around every few minutes while parking. That seemed to work ok.

This is a low budget, bubba style, amateur operation.
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Old 02-26-2005, 03:48 AM   #4
Join Date: Oct 2003
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So you just let the parts roll around on the bottom of a stainless pot? Damn, thats so simple!

So it's a burner, a thermometer, a stainless pot, mix the solution and voila?
I should have been doing this myself. How were the fumes?
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Old 02-26-2005, 08:21 AM   #5
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Originally Posted by kingfish
How were the fumes?
Do it outside. Don't forget to degrease the parts (soap & water) before before stripping them.
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Old 02-27-2005, 05:46 PM   #6
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Post some pictures if possilbe!!! I would love to see the friuts of your labor. I have a M1 carbine that was given to me by a neighbor and needless to say its a mess. They left it in the basement and was going to throw it in the garbage. Its has a 43 Inland barrel and is pretty well rusted up.

Needs a lot of TLC!!!

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Old 03-01-2005, 09:04 AM   #7
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I didn't take any pics of the bolts, but here's an M1 Garand trigger group I reparked using the same method:

click the pic for a higher resolution image...

That was a flash photo, so it looks lighter than it is.
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