Just picked up a sandblasting cabinet that I will use solely for cleaning housings, plates, rotors, ect. Mainly the pain in the ass parts of the motor to clean. I am looking at walnut shells Vs. baking soda for my media choice.



I would like a media where I wouldnt have to mask anything off. I would like to be able to blast even the machined face of the plates and the chrome surface of the rotor housings. I am thinking that a fine grade baking soda would be soft enough to do this. Anyone here tried this?

you again !



do you know what i know ?



it is no co-incidence these threads are all started pretty much around same time as all the goopy and NRS housing refinish threads

and no co-incidence that judge is a little vague as to he "machining" technique https://www.nopistons.com/forums/pub...1047683785.gif



i have been trying to play coy in all the threads but you i think are on to it anyhows





1 word



glass



method, pressure and particle size i will not make so easy

I'M EVERYWHERE!!! lol...



I am a machinist, so I have somewhat of a headstart in figuring this out https://www.nopistons.com/forums/pub...DIR#>/wink.gif



Most people will swear against spraying ANY type of media on the chrome or machined surfaces. But that's just bull...



I want to use glass, But i'm unsure of the pressure and grit/particle size as you stated is the hard part. That could get dangerous. I'm thinking a rough soda media might be the key. You could PM me if you like.

Don't use glass if you can help it, it's way nastier than Aluminum-oxide. Aluminum-oxide still requires masking things off...or just aim the media and block it with your glove. But, if you don't necessarily want to mask or block anything, just use walnut shells, but make sure your pressure and your compressor's capacity is up there.



I just recently media blasted my housings, and I just blocked with my glove and masked the exhaust port with green painters tape.



Hope it helps.



-Tim

Glass beads suck in general. Too much dusting and its not that effective on anything.



Lately I have been using 80 grit garnet aprasives. Its still mild enough to not remove material from aluminum, but it cuts through corrosion and paint faster, and doesnt dust. Its also well under half the price of glass beads for me.



As for spraying the chrome, have you ever tried? The chrome is so hard that glass beads or the garnet media I use will not cut into it. The only thing I could manage was to remove the carbon streaks from the chrome.



Soda is only for taking off paint from soft surfaces, it wont do much of anything on engine parts. I have never used walnut shells, but I wouldnt expect it to be much different.

my data point is a small one, but the walnut shells will deliver the aluminum part to an as new finish. so you can blast one part, and buy another new, and compare both, and they will be the same.



sand results in a weird finish...

Goopy's process has nothing to do with media blasting https://www.nopistons.com/forums/pub...1047683329.gif