Sanding

Post by **Tony Z** » Sat Oct 27, 2007 1:53 am

acid baths are usually easy to find, just not in the size big enough to do a chassis....

for the wet sand blasting idea, you can always add a soluble oil to the water to prevent rust....... then wash the area when you are ready to paint, allow to dry and primer it

SUZIE · Post by **SUZIE** » Sat Oct 27, 2007 4:56 am

Hi lowlight

No big acid baths in my area but in your area there is, cant remember there name but it is a company that does galvanizing, and they have big acid baths, big enougth to put the whole car in

Chris · Post by **Chris** » Sat Oct 27, 2007 5:55 am

Macsteel

SUZIE · Post by **SUZIE** » Sat Oct 27, 2007 5:58 am

Not sure if macsteel does galanizing, i do know they buy there steel in bulk from Mittal and resell it to other clients in smaller amounts

Chris · Post by **Chris** » Sat Oct 27, 2007 6:03 am

Macsteel in PE has a huge acid bath,that can fit 2 cars,for their galvanising.

I know,because I had to get rid of the old one they took out.

SUZIE · Post by **SUZIE** » Sat Oct 27, 2007 6:19 am

then there should be a branch in durban/PMB area, there is a branch in Newcastle but they do not have that fasilities

Blitzkrieg · Post by **Blitzkrieg** » Sat Oct 27, 2007 11:50 am

The 80 grit seems to work quite well

Tried last night, by hand

Gives you a workout. I will be having bulging biceps after this project is done

I have a Black and Decker sander here; I'm sure that it would make the task much easier

Today after work, will be in the garage until dark working on the chassis

SUZIE · Post by **SUZIE** » Sat Oct 27, 2007 11:52 am

BKB, dont tell me it is a orbital sander, and that you want to remove all the old paint and rust with that?, Get those sand paper disc that fits on to a small grinder, works much better

Blitzkrieg · Post by **Blitzkrieg** » Sat Oct 27, 2007 12:14 pm

Nope, it's not an orbital sander...

It's the one where you fit a square piece of sandpaper

I have a wire brush attachment for a drill to remove the rust with...

SUZIE · Post by **SUZIE** » Sat Oct 27, 2007 12:21 pm

Is the baseplate on the sander spinning or is it just making circular vibrations?

Blitzkrieg · Post by **Blitzkrieg** » Sat Oct 27, 2007 1:07 pm

Nah, the one making square vibrations

veecee · Post by **veecee** » Sat Oct 27, 2007 1:17 pm

have you tried one of these yet??? it spins at 8500rpm on an angle grinder. its q uite relentless and nothing stands in its way!!! go get one at your local builders warehouse!!!

the pic comes from this site which has a fantastic write-up of a full bug rebuild.

http://www.cirkut.com/bug/week4.html

SUZIE · Post by **SUZIE** » Sat Oct 27, 2007 5:27 pm

BKB then it is a orbital sander that you have there.

Surge · Post by **Surge** » Sun Oct 28, 2007 4:44 pm

Sand blasting or wet blasting is the easiest way to do it.
I've used those wire cup wheels that fit on an angle grinder and while they work well removing paint they're nearly useless on removing rust or mill scale.

In order to prevent the bare steel from tarnishing quickly you can mix 5% ammonia by volume into the water. The ammonia will have no effect on the Duram NS4 primer.

ZeroAxe · Post by **ZeroAxe** » Mon Oct 29, 2007 1:19 am

If you are going to use one of those wire wheels on the angle grinder, make sure that you wear a FULL face mask/shield(almost like a welder's helmet). Those wires DO COME OFF..... ask me how I know!?

While taking paint off and dealing with light rust, it is absolutely USELESS against stuff like Durabak(sp?) or those rubber coatings. All it does is 'melt' the rubber and move it around...... ask me how I know!?