![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
|
![]() |
#1 |
1972 Chevy Cheyenne Super
Join Date: Feb 2009
Location: Oklahoma City, OK
Posts: 302
|
Should I sandblast my cab?
I'm in the process of a cab swap and need some advice on whether or not I should have the new cab sandblasted.
I understand there are some risks associated with the blasting such as warping. My cab has some serious rust underneath with at least one front support rusted through in one spot. The firewall appears to be in good shape with only a little bubbly spot of rust where the AC condenser was bolted. There has only been a bit of bondo work that I want removed (it was poor quality and I'd just as soon have the body work done right). How do I know if I should blast it or not?
__________________
-Clayton 1972 Cheyenne Super LWB 350 - farm truck restore project - twitter @oldgreen |
![]() |
![]() |
![]() |
#2 |
Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,134
|
Re: Should I sandblast my cab?
warping occurs when you use high pressure above 60 psi and a slow sweeping motion creating hot spots. Don't think you have to knock it down to the metal in one pass. It will take 3or 5 passes to keep the warp away.
|
![]() |
![]() |
![]() |
#3 |
Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
|
Re: Should I sandblast my cab?
wata bout soda blasting...really thinking about this..
__________________
John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
![]() |
![]() |
![]() |
#4 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
|
Re: Should I sandblast my cab?
you could have just the floor and firewall sandblasted
sodablasting has lots of residule problems loads of shops wont touch something that's been soda blasted
__________________
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 |
![]() |
![]() |
![]() |
#5 |
Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,134
|
Re: Should I sandblast my cab?
Soda is only good on paint and light flash over rust, It won't do any good on heavy rust. Soda also has more work after the blasting to neutralize the soda.
It does leave a much better finish than abrasive blasting. I much prefer walnut shell for body parts that don't have a lot of heavy scale. You remove the paint and dirt and then work the areas with rust scale using an abrasive. |
![]() |
![]() |
![]() |
#6 |
Registered User
![]() Join Date: Jan 2009
Location: marion nc
Posts: 588
|
Re: Should I sandblast my cab?
IMHO i would blast. getting ready to blast mine. by doing this you will take care of all the rust and not worry about it coming back in a few years. but you can really get your feeling hurt when those "solid looking" areas turn out like swiss cheese.
__________________
69 short fleet 350/350 "under construction" 70 short step 307/3 speed |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Jul 2006
Location: the netherlands europe
Posts: 4,335
|
Re: Should I sandblast my cab?
the blasting allso makes for a rough finish it needs to be sanded anyway the soda blasting is a little better though
chemicly dipping might be an idea after that you can take the paint off in sheets with a powerwasher there are a couple of companies in the states doing that mostly to classics to preserve the metal and shape of the car and remove only rust
__________________
i got a job again and having fun at it too idea's for the trucks and the order of things to do are taking shape and get closer to being realized , a few more months and i be able to start building for real i complete 2 of the trucks intoo running fashion one custom and one basicly stock the thirth will be sacrificed for parts |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Jul 2006
Location: the netherlands europe
Posts: 4,335
|
Re: Should I sandblast my cab?
another thing with the blasting is that the metal will rust again faster
__________________
i got a job again and having fun at it too idea's for the trucks and the order of things to do are taking shape and get closer to being realized , a few more months and i be able to start building for real i complete 2 of the trucks intoo running fashion one custom and one basicly stock the thirth will be sacrificed for parts |
![]() |
![]() |
![]() |
#9 |
1972 Chevy Cheyenne Super
Join Date: Feb 2009
Location: Oklahoma City, OK
Posts: 302
|
Re: Should I sandblast my cab?
That's only true if I don't get it to primer immediately after the blast, right?
__________________
-Clayton 1972 Cheyenne Super LWB 350 - farm truck restore project - twitter @oldgreen |
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Jun 2006
Location: Utah
Posts: 1,562
|
Re: Should I sandblast my cab?
I had mine blasted and I'm glad I did. The blaster immediately covered it in epoxy primer because I knew I wouldn't have a chance to work on it for a while. He used Green Diamond for the blasting media and I'm very pleased with how it turned out.
|
![]() |
![]() |
![]() |
#11 | |
Registered User
Join Date: Jul 2006
Location: the netherlands europe
Posts: 4,335
|
Re: Should I sandblast my cab?
Quote:
the blasting removes the coating dipping doesnt . if you want the body to last a looooooooooong time and you dont have to weld anything on it you could coat it with zink (in the netherlands thats called skopperen it involves a special spraygun that melts zinkwire with a propaneflame and sprays the melted stuff ontoo the metal this zinkcoating will preent rusting for a long time to come but its poisonous when you need to weld it (gets you a headacke and makes you dizzy like youre stoned or drunk )
__________________
i got a job again and having fun at it too idea's for the trucks and the order of things to do are taking shape and get closer to being realized , a few more months and i be able to start building for real i complete 2 of the trucks intoo running fashion one custom and one basicly stock the thirth will be sacrificed for parts |
|
![]() |
![]() |
![]() |
#12 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
|
Re: Should I sandblast my cab?
I only sandblast rusted or nooks and crannies.Things that make no sense to do any other way,like brackets,frames,etc.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
![]() |
![]() |
![]() |
#13 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,866
|
Re: Should I sandblast my cab?
I had everything (sorta) sand blasted on my panel. All the edges and rounded areas were blasted inside and out. All the flat parts were left to be sanded. Side of body, hood, sweet spots on the doors...those flat areas.
|
![]() |
![]() |
![]() |
#14 |
Lemme show you something!!
Join Date: Apr 2007
Location: St.Helens, OR.
Posts: 876
|
Re: Should I sandblast my cab?
I'm with "watahyahknow" in that caustic soda dipping is the best method for prepping a classic vehicle for restoration. All paint, rust, undercoating, glue, bondo, everything but steel & lead is dissolved away. You have to make sure the outfit doing this does a good job of rinsing the solution out of the nooks and crannies and the parts go through a final phosphate or iron-oxide conversion bath and drying oven, before they hand 'em back to ya. Granted this is significantly more costly than media blasting, but the results are like day and night compared to sandblasting. I did this to a '62 Ragtop VW back in my younger years and it was awesome to have the metal so clean and not having to worry about sand or whatnot being trapped in seams and blind crannies....only to rear it's ugly head after the paint has gone on. I will be doing this again to my SWB frame and suspension components, as well as the inner fenders, core support and bed. If I wasn't already replacing most of the sheetmetal on the cab...I'd probably dip that too.
__________________
'67 CST-10 LWB ("Crusty") SOLD '67 GMC SWB ("Murdock") 2000 K1500 Suburban ("Betty") '95 BMW 325i ("Joy") |
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Jan 2005
Location: Australia
Posts: 215
|
Re: Should I sandblast my cab?
One thing I wouldn't do is acid bath it, a bloke I know had his car done and months later there was still acid dripping out of it through all the nooks and crannies, it would get up in the double skin of the roof in our trucks and chew it out in no time, when I had my car stripped I done all I could easily do with paint stripper and stripper wheel then sent it to the sandblasters to do the rest, don't let them blast the dash as they warped my one.
I guess there's fores an againsts any way you do it |
![]() |
![]() |
![]() |
#16 |
SWB 4x4 Collector
![]() Join Date: Jun 2001
Location: Osage City, KS
Posts: 5,152
|
Re: Should I sandblast my cab?
I would go the walnut shell method on body components. I would never do an acid bath on a body. Heard to many horror stories about it and if you don't remove your vin tags, it will dissolve it badly. All aluminum if any on the body will be destroyed. Sandblasting can warp body panels if the person doesn't know what he is doing, and soda blasting is just to be of a paint to clean up afterwards and worry about painting thereafter. Trevor
__________________
TREVOR ![]() ![]() ![]() ![]() ![]() http://67-72chevytrucks.com/vboard/s...d.php?t=624819 ![]() ![]() :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever |
![]() |
![]() |
![]() |
#17 |
Registered User
Join Date: Jul 2006
Location: the netherlands europe
Posts: 4,335
|
Re: Should I sandblast my cab?
they do drill holes in the car to let the acid out of those hollow spaces and sumtimes they bake the car to get the rest out
__________________
i got a job again and having fun at it too idea's for the trucks and the order of things to do are taking shape and get closer to being realized , a few more months and i be able to start building for real i complete 2 of the trucks intoo running fashion one custom and one basicly stock the thirth will be sacrificed for parts |
![]() |
![]() |
![]() |
Bookmarks |
Tags |
body work, cab, painting, rust repair, sandblasting |
|
|