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Rorschach A lot of dark matter came off, leaving stains. Should I dry and use sandpaper again or straight into bicarbonate soda it goes?

Those dark stains are the rust that has been converted by the treatment. A quick rinse with bicarb and then a good scrub with WD40 (scouring pad ideally) should clean it up nicely.

Rorschach Should I leave it in bicarbonate soda with water overnight?

No, a minute or two will be plenty.

Grendel wrote: ↑Sun Dec 05, 2021 9:08 am I've used wet and dry paper with brasso and that seemed to work better than just the sandpaper on it's own.

What is wet paper and what is dry paper?

ugoleaf wrote: ↑Wed Dec 08, 2021 11:07 amWhat is wet paper and what is dry paper?

Believe it or not you can also get "wet and Dry" sandpaper.

Someone-Else wrote: ↑Wed Dec 08, 2021 12:30 pm Believe it or not you can also get "wet and Dry" sandpaper.

I guess I can always put paper under tap water and dry it but I thought there's a special kind of paper...

Rorschach After two cycles of overnight citric acid and baking soda finale I think it will take a few weeks to bring USSR ruler back and make it great again using 800 grit sandpaper. Unless I want to go that route maybe I should use a fine file tool to speed things up? Although a nice polished ruler would be something Golumn would buy.

............all the TIME and effort, you can buy a new one for £11

Someone-Else wrote: ↑Fri Dec 10, 2021 4:22 pm ............all the TIME and effort, you can buy a new one for £11

You will never find USSR made stainless steel ruler.

ugoleaf wrote: ↑Fri Dec 10, 2021 5:23 pmYou will never find USSR made stainless steel ruler.

Yes I will, there is a set of 3 on ebay

Someone-Else wrote: ↑Fri Dec 10, 2021 7:30 pm

ugoleaf wrote: ↑Fri Dec 10, 2021 5:23 pmYou will never find USSR made stainless steel ruler.

Yes I will, there is a set of 3 on ebay

I can't believe this... I have failed my mission... All was in vain...