How to paint cast iron?

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vtsteam:
Just wanted to add one off beat factoid about removing grease and even baked on stuff.

Fast Orange. I've been amazed at what it will do.

We were given a free ten burner commercial range -- a 1957 two oven Garland. It was, as you can imagine buried under layers of cooked on grease/varnish, 1/4" deep in places.

I thought the chrome had rusted off of the gas taps because just a few flakes of chrome were left.

Wrong. I happened to have no cleanser available after I moved it through an open wall (I was just building the house) and no running water, or hot water for that matter. But I had a bottle of Fast Orange. So at lunch, I thought I'd clean the taps, and do a little something on the range every day.

I wiped on the Fast Orange and let it sit 5 minutes, then wiped it off with cold water and a paper towel. Brilliant chrome all of a sudden, in perfect condition. What I thought was rust was baked on grease varnish. I have learned since that this stuff will take off just about any grease/oil/farnish, and even wet oil paint form hands.

It's not just a hand cleaner, anymore.

PekkaNF:
Exelent! And I can get that Fast orange here (Finland) too. Finally something good about globalisation!

Yesterday I disassembled partly the drill head to use some parts of it. Looks like the moving spindle assembly/body fit is exccelent. Maybe I should try to fix the spindle bearings and that. Really funny english contraption. Some parts are really nicely done and some have shortcuts.

Now, the dilemma: The spindle head has some good fits and I don't want to destroy them. Plan:
1) Grease/gunk removal, I'm going to try fast orange.
2) Rust removal: Fast application of citric/phosphorous acid mix.
3) Wash with metal wash detergent
4) water removal - I'll try IPA

I'm putting here some pictures.

Allication of drain cleaner (PH10 or something caustic soda)

Then I dunked them in mild citric/phosphorous acid mix for overnight.
Pekka

vtsteam:
Of course, for most machinery work, you would want the non-pumice variety of Fast Orange -- obviously pumice isn't anything you want on bearing surfaces, Though I have used it on external cast iron surfaces where the whole part would be later hosed off..

awemawson:
It's brilliant stuff with the pumice for hands. I first found it at a welding course I attended some years ago and was amazed how it shifts grime - far better than Swarfega etc. I now buy bulk packs of the stuff on ebay when the price is right.

PekkaNF:
I think that the pumice nowadays is plastic particles. Least on some I have seen.

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