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I should like to blacken my stainless steel gun. But my problem is that i don't know the type of stainless steel that Sig Sauer employs

Good day.

I should like to blacken my stainless steel gun. But my problem is that i don't know the type of stainless steel that Sig Sauer employs.

I should do it with Stainless steel Blackener gel. Because the gel will not run off from the pièces.

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I shall disassemble totally my gun before to blacken it. Like that i shall blacken only the piece in stainless steel.

Because the barrel, all others pièces are in steel and in aluminium.

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Hi Christian 

We havent yet come across any stainless it wont blacken so you shouldnt have a problem.

The best thing to do is try a sample in a discreet area first so that you can be sure it does what you want.

If you find it wont blacken you may need to etch the steel with a  hydrochloric acid /water mix to allow it to take.

Be careful at this stage as the hydrochloric can attack the steel if left too long.

Ideally i would strip the barrel from the action,clean,parts and blacken using the solution rather than the gel.

The solution will give a much more even black and far better results.

I would warm the barrel first as the reaction times are faster and wearing strong rubber gloves work the solution onto the barrel using a fine scotchbrite pad (Like a washing up scourer).

Leave to react for a few minutes rinse off and reaply as required.

The finish is only a surface finish and so will need protecting with a lacquer or wax to help prevent scratching etc.

Scratches can be dabbed in with cotton wool and solution at a later date to keep it looking nice.

Cheers