sand blasting

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barbee6043 said:
Years ago, I had a pro sandblast guy, lift the car up ( usually a roller) with his boon truck, he laid on his back (and blasted and cussed alot!)
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That guy was a hoot and an expert at sand blasting.. One he did was a 69 Roadrunner, I had the hood in back of the truck, and he tells me he can blast it and not worp it. I almost called him a lier, but he was big and one mean sob it seemed. Well I let him blast it and NO worping! But otherwise, I just had him do the bottoms.
 
What was the old "prep sol* made of? Was that a phosphorus solvent? This was a Dupont product from back in the day.
Its been too many years since I was involved in painting cars. I remember Centari, imron (never used that though) prep sol and "3812" thinner ...
 
Be careful of any phosphoric acid solution, as there can possibly be reactions. I have had reactions months later. I have had auto paint company tech guys recommend neutralizing it with a last application WET and do not let it dry, since with water,,,,, yea such can flash rust.
I usually apply several wet applications, let each dry a day before the next coat, and next day neurtalize.
 
YY1 said:
What is the CFM @ 90 rating on your compressor?
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It would have to be at least a 20hp (15kW) motor to get near 90cfm at 100psi. So many air compressor manufactures embellish their cfm ratings…. It’s pretty well impossible to get more than 4cfm/hp@100psi from an air compressor, especially if it’s a single stage. If it’s two stage and has intercooling, then over 4cfm/hp @100psi is possible. Oh, and what is the elevation the compressor is operating at?

That would be pretty impressive if folks have a 20hp compressor in their garage!!
 
H22A4 said:
It would have to be at least a 20hp (15kW) motor to get near 90cfm at 100psi. So many air compressor manufactures embellish their cfm ratings…. It’s pretty well impossible to get more than 4cfm/hp@100psi from an air compressor, especially if it’s a single stage. If it’s two stage and has intercooling, then over 4cfm/hp @100psi is possible. Oh, and what is the elevation the compressor is operating at?

That would be pretty impressive if folks have a 20hp compressor in their garage!!
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Speaking to the OP.

You've misread my question.

CFM rating @ 90 PSI was the question.

I guess I assumed the "@90" part would be read as 90 PSI.

Under 10 is virtually useless to blast anything larger than a bracket.

Over 12 starts to get expensive, real fast.
 
Professor Fate said:
I don't have a forklift like some guys around here ( :) ) but with a roller or a shell it's pretty easy to do with a cherry picker (engine hoist). You might have to do it in stages, just so the angle doesn't get too crazy sitting on barrels as the other end goes up.
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Body lift bracket kit

junkerup.jpeg
 
And the media will forever come out of the hidden places forever. I have a Road Runner that was sand blasted at some time, I have tried to blow it out of the rocker panels, but way too much of it is still in there, it's sort of set up. Good thing the car never gets wet.
 
No wonder places like rockers rot out so bad.... If the sand got in (and trapped) when they sit out and it rains water apparently will too. So definitely need to get in there and prime/ undercoat the snot out of those areas while dry. Have to get some of those plugs like ziebart used to have, drill in an inconspicuous spot and spray oil, tar, something like that inside of there ..
Maybe you could drill like that enough to get an air wand in there, blow out and coat then pop a plug in there. Wouldn't be assembly line "correct" but if you do say the back of the inner rockers nobody would see them....
If someone bitches call it a "day 2" mod
 
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