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Old 05-24-2013, 07:39 PM
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Sandblasting?

I'm getting ready to paint my car and i was wondering if sandblasting the body would be the way to go. Its all rusty with very little paint on it. I was told that sandblasting isn't a good thing to do, and grinding it down to bare metal would be best. Is that what i should do?
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Old 05-24-2013, 09:05 PM
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sandblasting

Sandblasting can warp bocy panels. It's best used on heavier pieces. I have an old smaller hobby blaster, but I asked aroung the guys that do restorations and sent the 29 nash roadster (pict above) to a pro. and He was not able to get out all the rust pits.
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Old 05-25-2013, 05:11 AM
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It really depends on the car to know the best way to strip it...If you post some pics I can tell you for sure which way is best and if you could do it yourself..
If you were to blast it yourself you would most likely ruin the car (I would) you need to be experianced to blast a car without ruining it...
So if theres not much paint left on it you dont really need to know how to remove paint but how to remove rust....and your not getting ready to paint your getting ready to do body work,the actual painting sounds a long way away...
Post some pics it sounds like something you can do yourself fairly inexpensively.
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Old 05-25-2013, 06:54 AM
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Had a friend of mine that rented a setup and blasted a 70 Camaro. Derstoyed the doors, roof and hood panels. Warped so bad that it Looked like the car had been in a fire.. On top of that he painted the car black. What a mess!!
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Old 05-25-2013, 08:08 AM
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Yes, I have been lambasted for years on web sites for screaming DO NOT SANDBLAST SHEET METAL because I have SEEN it, I have read about others on forums who's cars were ruined, DO NOT SANDBLAST SHEET METAL. Is it possible, hell yes, it is, first off, what "sand" is being used? There are people who toss around the term "sandblast" not knowing what is being used. There are plenty of professionals who can pull it off, there are plenty who use other media that isn't really "sand" that pull it off, but even "pros" can DESTROY auto body panels. I have had it happen myself!

I have a sand blasting place near me, a huge metal building, this guy sand blasts anything and everything and I have had him do stuff for years for me. Even a few pieces of sheetmetal without a problem. I brought him a 28 Buick sedan door that I was going to make a sign out of. It was a VERY nice door with only some super minor surface rust but the biggest problem was the original paint that was flaking off. I simply needed it "lightly" blasted, I made it clear just lightly go over it as it is going to be a sign and doesn't need to be perfect. I was going to blow some primer over it, sand it and blow some paint. Perfection was not an issue.

I came back to pick it up and it was RUINED, we are talking oil canning DESTROYED. Because this was just a sign I was able to save it with some shrinking with the torch and then pile on a LOT of filler. If it was for a car I would have had to make a new skin, it would have been easier than straightening the warped junk it had became.

I don't know if he gave this job to someone else, I didn't see anyone else working there, I have no idea, but this sucker was RUINED.

And there are all myths about how to do it that are all wrong, even with pro's talking about the "heat" and not to "heat" it up. I believed the same myth for years. Sand blast in the dark and you will see what I am talking about, you get a friggin light show, sparks flying off the panel! Spark, friction, heat, AHHHH it warps the panel with heat!

Sorry, not even close. Someone set me straight years ago that it is NOT from heat, and I have proved that to myself too, sand blast a piece of metal yourself and then feel it, it is actually COLD, you are blowing cold air on it! You are blowing a lot more cold air than sand, so yes it's colder. So how does it warp?

The sand acts like tiny hammers putting tiny dents in the surface of the metal. It's called "mechanical compression" or something like that. The sand particles are putting hundreds of thousands (millions?) of tiny dents in the surface of the metal. We are talking so small, that it is just on the surface, making that surface area larger. You have larger top surface than the bottom surface and the metal shape gets changed, PERMANENTLY. Sure some talented Tinman can repair it sometimes but realistically it is is throw in the garbage destroyed!

Give it a LOT of respect, LOTS of respect!

Brian
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Old 05-25-2013, 08:10 AM
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Quote:
Originally Posted by BOBCRMAN@aol.com View Post
Had a friend of mine that rented a setup and blasted a 70 Camaro. Derstoyed the doors, roof and hood panels. Warped so bad that it Looked like the car had been in a fire.. On top of that he painted the car black. What a mess!!
I have seen threads started on forums over the years over and over and over with some poor guy who has RUINED his dream car! It is sickening how many cars have been RUINED by sand blasting.

Brian
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Old 05-25-2013, 11:29 AM
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I had a 1950 mercury that was sandblasted locally and destroyed. Thats why im looking for an alternative. Here is a picture.[IMG][/IMG]
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Old 05-25-2013, 05:16 PM
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AHH, now thats right up my alley, a dead body ....I kinda like the color though.
I'm having trouble posting pics at the moment but I'll post some pics of what you can do and how its done. start looking for some ospho,your gonna need a qt...and a 4.5"electric side grinder with some 4'' wire cups, stiff ones (coarse) to get started...You wont believe how well this stuff works on this type of job.
Do you have a compressor???? Love that ride...
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Old 05-25-2013, 08:02 PM
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Alright, ill start looking for that stuff. Thanks its my favorite car that i own. And yes i do have a compressor.
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Old 05-26-2013, 05:36 AM
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try lowes or Home depo ,ace hardware,bodyshop supply stores or even sherwood williams outlets...but you can order direct from skyco if you have trouble finding it..dont get any other brand....most of that stuff is real crap.
I've used this product for over 35 yrs to remove rust.
I'll try again to post some pics
nope,no luck
I got one to go thru, this is what a qt of it looks like
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Old 05-26-2013, 05:42 AM
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Quote:
Originally Posted by 29chev View Post
Alright, ill start looking for that stuff. Thanks its my favorite car that i own. And yes i do have a compressor.
Its a cool car for sure.having a compressor is going to be a big help you'll need some die grinders and smaller wire wheels for the details like drip rails and crevases...
let me know when you find the stuff ,I'll run through it with you..

meanwhile ..........
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Last edited by deadbodyman; 05-26-2013 at 05:49 AM.
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Old 05-26-2013, 05:52 AM
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I love going back and looking at these old pics ...man that was a lotta dirty work.
At least the grand kids had a place to play...
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Last edited by deadbodyman; 05-26-2013 at 06:06 AM.
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Old 05-26-2013, 02:08 PM
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It looks like that stuff must work pretty good... and I have all the supplies but the ospho..can't seem to find it anywhere around here..
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Old 05-26-2013, 06:25 PM
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What year is that car? Its pretty nice looking. And i think im going to have to order that stuff online!
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Old 05-26-2013, 07:00 PM
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I've never been able to find Ospho in a store
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