sandblasting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RedZ71 · 07-01-2007, 07:32 PM

well, today i tried out my sandblaster. i blasted about 1/4th of a rally rim, and thought to myself "i didnt picture it comming out this rough-looking on the baremetal".

is that whats normal? also, whats the common method to preparing "viewable" parts for refinishing? i suppose i might need to sand it down quite a bit after im done stripping the rust off, but the shape of the rim is going to make that a total pain in the ass.

tips, stories, etc?

projectking · 07-01-2007, 07:49 PM

Try blasting with walnut shells, will leave less of a profile on the steel. DuPont calls theirs Starblast, there are other brands out there that are a little cheaper. You can use a filler primer to smooth things out too.

RedZ71 · 07-01-2007, 08:06 PM

aight then, i saw that at harbor freight, ill pick some up tomorrow.

woodridge · 07-01-2007, 09:20 PM

What type of media are you using? We use 120 glass beads and it leaves a smooth gray finish.

Sport/Truck · 07-01-2007, 09:43 PM

My experience with walnut shells hasn’t been too good. I supposed it depends on the paint you are trying to remove.
s/t

RedZ71 · 07-01-2007, 10:21 PM

well im trying to remove a combination of rust and chipped paint.

Sport/Truck · 07-01-2007, 10:29 PM

I don’t think it will remove rust, paint maybe. Have you considered powder coating your wheels?
I don’t think the rough finish is going to hurt your paint outcome if you use a Base Coat/ Clear Coat.
s/t

**jaros44sr** · 07-02-2007, 06:39 AM

How much air pressure are you running???

cdowns · 07-02-2007, 08:02 AM

walnut shells wont do much on rust// i blast rusty rims with sand then just use 80-100grit to cleanup wipe down with thinners and epoxy primer and then the color with great results

jec · 07-02-2007, 08:32 AM

Sandblasting leaving a rough finish?

I would say that unless the rust has pitted the metal, it is normal and does not matter. I blasted an entire frame, cab, etc. using "play sand". You must wear a mask because regular sand contains silica dust.

The roughness is actually a good thing when it comes to painting. This makes paint and/or primer adhere really well. Also, primers and paint fill in a sandblasted surface and will be mirror smooth.

My 2 cents........................

Sport/Truck · 07-02-2007, 09:02 PM

Quote:

Originally Posted by cdowns

walnut shells wont do much on rust// i blast rusty rims with sand then just use 80-100grit to cleanup wipe down with thinners and epoxy primer and then the color with great results

Quote:

Originally Posted by jec

Sandblasting leaving a rough finish?

I would say that unless the rust has pitted the metal, it is normal and does not matter. I blasted an entire frame, cab, etc. using "play sand". You must wear a mask because regular sand contains silica dust.

The roughness is actually a good thing when it comes to painting. This makes paint and/or primer adhere really well. Also, primers and paint fill in a sandblasted surface and will be mirror smooth.

My 2 cents........................

s/t

**ScottH** · 07-03-2007, 09:48 AM

So what is the best sand to use, and where can you buy it?

Thanks.

Scott

07-01-2007, 07:32 PM	#1
RedZ71 Junior Member Join Date: Jan 2007 Location: Dallas, TX Posts: 246	sandblasting well, today i tried out my sandblaster. i blasted about 1/4th of a rally rim, and thought to myself "i didnt picture it comming out this rough-looking on the baremetal". is that whats normal? also, whats the common method to preparing "viewable" parts for refinishing? i suppose i might need to sand it down quite a bit after im done stripping the rust off, but the shape of the rim is going to make that a total pain in the ass. tips, stories, etc? __________________ Jonathan 2001 ECSB Silverado Z71 1971 LB C10 Custom www.z71silverado.com

07-01-2007, 07:49 PM	#2
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: sandblasting Try blasting with walnut shells, will leave less of a profile on the steel. DuPont calls theirs Starblast, there are other brands out there that are a little cheaper. You can use a filler primer to smooth things out too. __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

07-01-2007, 08:06 PM	#3
RedZ71 Junior Member Join Date: Jan 2007 Location: Dallas, TX Posts: 246	Re: sandblasting aight then, i saw that at harbor freight, ill pick some up tomorrow. __________________ Jonathan 2001 ECSB Silverado Z71 1971 LB C10 Custom www.z71silverado.com

07-01-2007, 09:20 PM	#4
woodridge Senior Member Join Date: Feb 2005 Location: Maynardville, Tn Posts: 3,030	Re: sandblasting What type of media are you using? We use 120 glass beads and it leaves a smooth gray finish. __________________ SEMA Network- Protect our Hobby! 71 C30 in pieces, starting to come together. Click here for A Place For Tennessee Truck Enthusiest To Meet

07-01-2007, 09:43 PM	#5
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: sandblasting My experience with walnut shells hasn’t been too good. I supposed it depends on the paint you are trying to remove. s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

07-01-2007, 10:21 PM	#6
RedZ71 Junior Member Join Date: Jan 2007 Location: Dallas, TX Posts: 246	Re: sandblasting well im trying to remove a combination of rust and chipped paint. __________________ Jonathan 2001 ECSB Silverado Z71 1971 LB C10 Custom www.z71silverado.com

07-01-2007, 10:29 PM	#7
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: sandblasting I don’t think it will remove rust, paint maybe. Have you considered powder coating your wheels? I don’t think the rough finish is going to hurt your paint outcome if you use a Base Coat/ Clear Coat. s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

07-02-2007, 06:39 AM	#8
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,761	Re: sandblasting How much air pressure are you running??? __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

07-02-2007, 08:02 AM	#9
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: sandblasting walnut shells wont do much on rust// i blast rusty rims with sand then just use 80-100grit to cleanup wipe down with thinners and epoxy primer and then the color with great results __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

07-02-2007, 08:32 AM	#10
jec Registered User Join Date: May 2000 Location: Middletown, Ohio Posts: 131	Re: sandblasting Sandblasting leaving a rough finish? I would say that unless the rust has pitted the metal, it is normal and does not matter. I blasted an entire frame, cab, etc. using "play sand". You must wear a mask because regular sand contains silica dust. The roughness is actually a good thing when it comes to painting. This makes paint and/or primer adhere really well. Also, primers and paint fill in a sandblasted surface and will be mirror smooth. My 2 cents........................

07-03-2007, 09:48 AM	#12
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Re: sandblasting So what is the best sand to use, and where can you buy it? Thanks. Scott __________________ 1963 C10 swb fleetside 1966 GMC G1000 Handi-bus (future project) 1955 Chevy 2 dr. wagon



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