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Black finish for stainless steel

Hi I have 300 stainless steel bolts washers and rings that need to be finished black or coloured anything other than stainless steel colour I can colour steel ok but have never tried stainless it needs to be as rust preventative as possible as they will be outside at times does anyone know a cost affective and safe way of doing this sort of quantity?

Paul Stevens
gunsmith - Barnstaple, North Devon, England
2007

A black oxide for stainless steel gives a dark gray non permanent coating.
If it is important, see if you can find a professional shop to have them black chrome plated.

James Watts
- Navarre, Florida
2007

Oil your objects very sparingly ,then heat them to 300-400C(with hot air gun).Any edible oil or fat can be used ( boiled linseed oil ⇦ on eBay or Amazon [affil link] is best).Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
2007

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