Stuart Twin Victoria (Princess Royal) Mill Engine

[JasonB]

On JasonB Said:

Grinding bit in a Dremel would smooth the casting or brick acid is good for getting scale off steel so should work on CI.

Yes I’d use JBW these days

Tried the Dremel a couple of days ago, with grinding bits and the abrasive cylinders, but it didn’t touch the scale. It’s like very hard glass. I’ll get some acid and try that.

[JasonBModerator @jasonb]

Let me just check it won’t attack the iron, will put some in this morning and report back.

[JasonB]

On JasonB Said:

Let me just check it won’t attack the iron, will put some in this morning and report back.

Thanks Jason, I can get some from Screwfix down the road if it’s suitable.

[JasonBModerator @jasonb]

While it ddd not attack the CI sample it did seem “damp” which I assume is some of the acid soaking into the porus iron. So probably not the best idea as the acid may come back to haunt you in the form of rust. It also did not attack the paint that was on one face of the sample.

[JasonBModerator @jasonb]

While it did not attack the CI sample it did seem “damp” which I assume is some of the acid soaking into the porus iron. So probably not the best idea as the acid may come back to haunt you in the form of rust. It also did not attack the paint that was on one face of the sample.

[JasonB]

On JasonB Said:

While it did not attack the CI sample it did seem “damp” which I assume is some of the acid soaking into the porus iron. So probably not the best idea as the acid may come back to haunt you in the form of rust. It also did not attack the paint that was on one face of the sample.

Ok thanks for that. I’ll continue with chipping it away and filling the rest.

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