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Author Topic: Sand blasting... Chassis  (Read 1599 times)
chris69ssx11
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« on: October 07, 2013, 11:03:17 PM »

Hi,
Has anyone ever sandblasted the under carriage (chassis) of their Camaro without taking it apart?

Anyone from Connecticut who can suggest a sandblasting business?
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69Z28-RS
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« Reply #1 on: October 07, 2013, 11:06:36 PM »

People have probably done it, but I'd bet they regretted it also.. Smiley  I would not recommend that.
Sand goes *everywhere* and is not controllable very precisely when you are sandblasting.   You can protect items by applying two layers of duct tape, but that would take you longer than disassembly probably.   We'll see if you get any positive responses on this. Smiley
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
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JohnZ
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« Reply #2 on: October 08, 2013, 01:02:25 PM »

I can't IMAGINE sandblasting any part of a completed car or chassis - sandblasting is an incredibly destructive and irreversible process, and can eat through car sheet metal in a heartbeat. Don't do it!  Shocked
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'69 Z/28
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Sauron327
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« Reply #3 on: October 08, 2013, 04:55:54 PM »

I blast bodies prior to restoration. If you know what you are doing, panels will not get destroyed or warp. What is wrong with the belly that you think it requires blasting? If it's rotten, the car needs more than a blast. Blasting an assembled car is not the best procedure.
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jacmac
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« Reply #4 on: October 08, 2013, 05:58:10 PM »

Has anyone heard of "Ice Carbon Blasting" I tried it on a 73 camaro I restored last year.Basicly what it does is freeze the crud off your car.I just did the under carriage.It turned out pretty good & most of the original primer was still intact.Also there was very little mess only the crud that was on the car.I was happy.
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chris69ssx11
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« Reply #5 on: October 13, 2013, 10:09:17 PM »

Okay... Thanks all for your replies...
New question...
What is the best way to clean up some surface rust on the undercarriage and chassis... wire brushes and wire wheels don't do a good enough job... many nooks and crannies and hard to reach areas.
Any suggestions?  Thanks.
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BillOhio
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« Reply #6 on: October 20, 2013, 08:54:40 PM »

If you want to recoat it, look into por-15 or KBS topcoats. Metal doesn't have to be rust free but I would take scale off.
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69Z28-RS
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« Reply #7 on: October 20, 2013, 10:53:01 PM »

Once you've sanded, scraped, etc.  as well as you can to remove loose rust, Dupont MetalPrep (or similar, such as Jasco) etc can be used to prep the metal for primer and paint...  This is an phosphoric acid which will convert light remaining rust to a different oxide which will accept paint.
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
69RSZEE28
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« Reply #8 on: November 22, 2013, 01:00:47 AM »

soda blast it. sodium bicarbonate (baking soda) works extremely well.
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tom
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« Reply #9 on: November 25, 2013, 02:02:06 AM »

I thought soda blasting wasn't supposed to take down rust.
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69Z28-RS
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« Reply #10 on: November 25, 2013, 10:29:22 AM »

That's my thought as well, although I've never actually did it myself.  I'm under the impression that the soda is immersed in water, and that you're 'blasting with a soda/water solution' which abrades away paint, but I would not want to use water to 'blast away rust'..??  Just my only partially informed thought....
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
BULLITT65
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« Reply #11 on: November 26, 2013, 12:49:31 AM »

Are we just talking mostly the front sub-frame? or can you provide any pics?. A picture on the CRG is worth a thousand (helpful) words. The more detail we have the better we can help you most of the time.
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Sauron327
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« Reply #12 on: November 26, 2013, 05:58:56 AM »

Once you've sanded, scraped, etc.  as well as you can to remove loose rust, Dupont MetalPrep (or similar, such as Jasco) etc can be used to prep the metal for primer and paint...  This is an phosphoric acid which will convert light remaining rust to a different oxide which will accept paint.
Acids prior to the use of epoxies is not recommended by some paint manufacturers. Best to follow the TDS for the paint being used. What applies to one paint does not apply to all.

soda blast it. sodium bicarbonate (baking soda) works extremely well.
Post soda prep is vital to paint performance. Failure to do so can lead to fallure.
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Charley
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« Reply #13 on: November 26, 2013, 10:07:50 AM »

If you are talking about just removing rust. Get some safest rust remover, a plastic tarp or kiddie pool, a fountain pump, short section of garden hose with a spray nozzle. Basically you are washing all the rust away, leaving bare metal, orig paint markings etc will still be there. Not expensive and not abrasive like blasting etc. Will be rust free in several hours. Basically you put the pump in the bottom of the pool or tarp that is sloped to flow the liquid back to the pump. The spray nozzle showers the area you want treated. You don't need to be there all the time, just come back once in awhile and re position the spray nozzle. It really is amazing. http://safestrustremover.com/
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Charley
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« Reply #14 on: November 26, 2013, 10:09:56 AM »

http://safestrustremover.com/before-after2.asp?B=shock-b&A=shock-a&btext=Inside%20view%20of%20brake%20caliper%20assembly%20%20,notice%20emergency%20brake%20cable%20spring%20and%20rubber%20selve%20on%20cable.&atext=Notice%20overall%20condition%20of%20hardware%20after%20rust%20removal.
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