Hi...
there are a couple of good threads on the subject...this is one:
http://smith-wessonforum.com/smith-...testing-5906-frame.html?highlight=media+blast
Econo Blend #4 from McMaster Carr is the best media to replicate the factory finish (IMHO)...
Some tips on the process:
1) The gun must be FULLY disassembled. ALL PARTS, including the extractor, which can be hard to remove and re-install.
2) The gun must be cleaned and degreased. Strongly recommend the use of an ultrasonic cleaner. Not cleaning that gun properly will contaminate the blast media and make it very hard to clean after blasting.
3) Using a blasting cabinet helps. I built one using a plastic box.
(my first basting cabinet
)
4) Compressor should have a oil separator/filter and a dissicant filter to make sure the air is DRY.
5) Barrel bushing should be covered with electric tape (using a cork, preferible electric tape)
6) if cabinet leaks media, wear a respirator and a mask (media blast gets in your lungs)
7) Blasting pressure should be around 70 PSI. Use circular patterns. Keep the gun, around 2-3 inches away from the part.
After blasting, clean the gun very well with water and some brushes to make sure all the media is removed.
Blasting can take a gun from an ugly state
to a factory new...
Unless you have all the necessary tools, the compressor and the media ...it is an expensive proposition...
The best route would be to send it to a gunsmith, like BMCM for blasting and he will do a fantastic job...
Hope this helps,
Guzzi
