SCOTCHBRITE GRIT CHART (courtesy of Charlest) back to top
Fine wire wool at best, with a nice thin oil.
SCOTCHBRITE GRIT CHART (courtesy of Charlest) back to top
3M Scotch Brite Nylon Pads:
7445 - White pad, called Light Duty Cleansing - (1000) 1200-1500 grit
7448 - Light Grey, called Ultra Fine Hand - (600-800) 800 grit.
6448 - Green (?), called Light Duty Hand Pad - (600) 600 grit
7447 - Maroon pad, called General Purpose Hand - (320-400) 320 grit
6444 - Brown pad, called Extra Duty Hand - (280-320) 240 grit
7446 - Dark Grey pad, called Blending Pad (180-220) 150 grit
7440 - Tan pad, called Heavy Duty Hand Pad - (120-150) 60(?)
Green Scotch Brite is available EVERYWHERE. It's 600 grit.
Blue Scotch-Brite is considered to be about 1000 grit.
They're knackered anyway.
Not me I'm afraid.Exactly as per your thread on the model engineering forum a month ago, I suppose?
404 | Model Engineer & Model Engineers Workshop
It looks like we've lost a piece!404: Page not found This page could not be found. Maybe try a search? If it's a forum topic you are looking for, ...www.model-engineer.co.uk
I was thinking something chemical rather than mechanical. I'll give citric acid a try.I'd try citric acid rather than an abrasive. Don't think it will ruin the surface finish but don't hold me responsible if it does.
I guess what this formulation contains Ethylenediaminetetraacetic acid (EDTA).More of a question than a suggestion, but how about Evapo-Rust?
It's non corrosive and (AFAIK) only works on the iron oxide.
Don't put Citric acid anywhere near a gauge block.
A ground flat stone or gauge block stone would be best.