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Theres a load of parts on my car that were originaly an 'oiled zinc phosphate' finish like all of the blackish bolts and many of the clips. Other parts were a lighter grey 'oiled manganese phosphate' like the shifter mechanism and a couple of shifter rods and many swaybar and radius rod parts. I cant find anyone here in SA that even knows what I'm talking about, seems like theres a few places in VIC. Anyone here had phosphating done properly? I'm not interested in the Caswell DIY kits, they're garbage apparently. I'll have to send this stuff interstate to get done I think. Most restos I've seen lately just go with the Zinc with black chromate conversion coating which gives a jet black finish, often glossy. Thats not the look for me. The oiled zinc and manganese phosphate finish looks like this. 
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The local clips were all zinc phosphated, and the bolts, depending on where they came from, a mixture of Manganese Phosphate, Zinc Phosphate, and Iron Phosphate. You won't pick the difference by eye reliably as the finished texture and colour depend on the item being treated. I do my own. You may have more luck with Zinc Phosphate if you ask for "Parkerizing". Gunsmiths also regularly use this process. It was originally done as an in-line process in heated tanks after quenching and tempering so, as always, a lot of preparation is necessary for old parts. ACS in Melbourne may be able to assist. Edit: Since few people do it as a standalone process you would be better off trying a heat treater in Adelaide. There are a few still operating I believe. Edited by user Friday, 1 September 2017 10:18:15 PM(UTC)
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I believe that A class platers in Lonsdale do this process.
I am going to go there first thing Monday with some clips .
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Originally Posted by: LC870  I believe that A class platers in Lonsdale do this process.
I am going to go there first thing Monday with some clips . No I've been there they only do the black zinc chromate and he had no idea who did Phosphating/Parkerizing
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Originally Posted by: gm5735 The local clips were all zinc phosphated, and the bolts, depending on where they came from, a mixture of Manganese Phosphate, Zinc Phosphate, and Iron Phosphate. You won't pick the difference by eye reliably as the finished texture and colour depend on the item being treated.
I do my own.
You may have more luck with Zinc Phosphate if you ask for "Parkerizing".
Gunsmiths also regularly use this process.
It was originally done as an in-line process in heated tanks after quenching and tempering so, as always, a lot of preparation is necessary for old parts.
ACS in Melbourne may be able to assist.
Edit: Since few people do it as a standalone process you would be better off trying a heat treater in Adelaide. There are a few still operating I believe. Cheers Geoff, I found one place here so I'll contact them tomorrow. I may end up doing myself. Thanks for your help.
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