Posted by Nigel Graham 2 on 27/07/2019 22:09:18:
Obviously not wanting to abrade it, I'd start first with one of those plastic kitchen scouring-pads ….
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Nigel,
I hope you don't mind me mentioning that 'those plastic kitchen scouring-pads' are rather variable !!
Some of them are just plastic, but others have abrasive particles bonded into the fibres … and can be much more abrasive than steel wool. Just try [if you dare] rubbing 'across the grain' on a brushed stainless steel surface.
MichaelG.
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Edit;
[quote]
At relatively low magnifications, several embedded particles 30-100µm in size were rapidly identified by the SEM, using both secondary electron and then HDBSE imaging. HDBSE imaging distinguished the elemental variations of the particles, piston coating and aluminum substrate, which were then subsequently qualified and measured to determine their composition using EDX.
This data was used to further investigate the engine assembly process. What the engineers found was that the source of the contamination was the Scotch-Brite pads consisting of Al2O3 abrasive employed in engine block cleaning. The elimination of the use of Scotch-Brite pads has resulted in zero re-occurrences, thereby saving considerable time and money.
[/quote]
Ref. https://www.azom.com/article.aspx?ArticleID=12159
Edited By Michael Gilligan on 27/07/2019 23:39:05