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Posted by: sechszylinder Apr 11 2003, 02:49 AM

Hello,

i'm in progress to restore a 914/6. The car is stripped to bare metall and i found some rust here
and there, but not as much as expected. Fortunately the longitudinals are as well o.k. .

All four fenders are disassembled, so i do not have to worry about them.

That's not the first 914 that i rebuild, but this time i'd like to make it very clean.

Now here's my question: Does anybody has experience with media blasting and the pros
and cons of it ?

many greetings and "luftgekühlte grüsse aus berlin"

Benno

Posted by: Jeroen Apr 11 2003, 04:13 AM

Hey Benno,

If you don't do big smooth surfaces, like the hoods or the fenders (they can warp from pressure and heat), you should be fine.
Take it to a place that does cars, not just an industrial blaster.

cheers,

Jeroen

Posted by: boxstr Apr 11 2003, 09:44 AM

The media blaster here in Portland Oregon uses a plastic bead, I have used him for a number of different things including a 914 hood and there was no warping. I was very pleased with the outcome. One thing it doe's leave the small plastic beads in hard to get to places, comperessed air is a must.
PS: he is a car blaster only.
CCLinLOO

Posted by: tod914 Apr 11 2003, 10:16 AM

Cons - I took my rockers to be media blasted. The guy sandblasted instead and warped them.
Pros- He replaced them with 2 new oem outerrockers.

I would be hesitant on large panels. I think your best off doing it by hand. Find a good rust nuetralizer like rust mort, not por15 which cant be painted.

Posted by: Mueller Apr 11 2003, 10:41 AM

I sandblasted my engine compartment myself (with motor out of the car).....besides making a huge mess in the garage ....I was having to clean sand off of my motor every single time I took it out for a drive....the sand will get into cracks and seems that I didn't know existed.

A medium that is larger than sand would be a better choice, unless you methodically clean and use lots of compressed air to blow out the sand. I'd almost be tempted to put the bare chassis on a trailer and drive around for a while to "vibrate" out the hidden sand if you go that route.

Posted by: SirAndy Apr 11 2003, 10:59 AM

same as the above posts. it'll work great to clean up ther car, but
you need to clean it big time afterwards.
use a industrial vacum cleaner and compressed air.
i had tons of sand coming out of all kinds of hollow areas etc.
it's a mess

Posted by: Mueller Apr 11 2003, 11:14 AM

Andy,

What did it cost to sandblast your trunks?

Posted by: SirAndy Apr 11 2003, 11:16 AM

i think it was $400.
Got ripped off because the same guy had charged Scott $400 for a complete car earlier.
Ask Brad for more details, i think he knows the guy.

Andy

Posted by: GWN7 Apr 11 2003, 12:15 PM

Make sure who ever does it for you has experience in doing car parts. I'm looking for a new rad cradle for my 68 Impala because of this. Wrong pressure and blasting medium can make a mess out of the nicest parts.

Posted by: mr914 Apr 11 2003, 12:17 PM

I'm thinking about using either talc or walnut shells on my restoration.

The words of wisdom that I got from an industrial blaster is to do a little at a time....

Posted by: Brad Roberts Apr 11 2003, 12:18 PM

Mueller, the place is right off of 880 and 101. They have been blasting cars for 20+ years. They also happen to be a foundry (if you know what I mean) They can do aluminum casting... get the hubs done.


B