Sand blasting stainless steel pistols

[RamRoddoc]

So finally got my sand blasting cabinet with HEPA filtration system. Yes, I also have a respirator to prevent inhalation of the silica. I used it for the first time with some fine mesh 70/80 grit sand to blast a cheap stainless pistol. I used 80 to 90 PSI with a medium ceramic nozzle. The finish is ok but I was hopeful that I could reproduce a satin stainless like on Kimber's 1911’s.

I’m thinking an initial light sand blast with the 70/80 grit mesh silica then using walnut hull media to smooth out the texture to more like the Kimber satin finish. Would I add a polish to the media? Any thoughts?

Here is a pic and if we have any sand blast gurus please speak up as I'm just starting out. Please give your thoughts on media, PSI selection, blasting gun nozzle size for a soft satin stainless. Remember my goal is to attempt to reproduce the Kimber satin stainless. Thanks for any assistance or guidance you may offer.

 

[oldmetlfan]

Here is a link with some quick info on different media, and what it is generally used for.

http://www.fortnaequipment.com/Media.htm

 

[RamRoddoc]

Thank you oldmetlfan! Very useful information for a knob beginner such as myself.

 

[RamRoddoc]

To anyone interested, after several hours surfing, I found this link with a good diagram on media types, PSI recommendations and uses. Go to the useful information section and even more information is to be had.
http://www.stratusfinishing.com/blast_media.asp

This must be a industry secret?

Found this guide too might be of use to another knob such as myself: http://www.guysonlib.co.uk/lib/blast/guyson_blast_media_guide.pdf

 

[Clarke123]

Great information ... Thanks!

BTW: From what I have found, 120 Grit is what most refinishers say that they use prior to application of Cerakote and other finishes.

 

[drtybykr]

Glass beads are the best media for a even matte finish on stainless. Start with a lower pressure, and stay a few inches away from the surface with your nozzle.

 

[womsterr]

second on glass beads...