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Registered:
August 2002
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 Acid dipping
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Sat, 21 September 2002 10:04
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can anybody tell me if there is a car-sized acid bath in or close to Canberra? otherwise, does anybody know of one and if so where is it???
any help locating one is appreciated.
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Location:
Melbourne
Registered:
May 2002
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Re: Acid dipping
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Mon, 23 September 2002 14:13
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No,
not close to Canberra. All I know of acid dipping is a way of lightening shells - but then they are seam welded and roll cage installed!!
I'd like to know more.
David
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Registered:
August 2002
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Re: Acid dipping
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Mon, 23 September 2002 23:28
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just like a tank used for cleaning up engine parts, but a lot fuggin bigger!
i am beginning a chassis-off resto and i'm looking for a tank because i am trying to avoid bare-metalling and cleaning up the near 50 year old body by hand. and if all i needed after that was a bit of seam-welding and a cage, i'd be delighted, but that is not the case. want to dip it and kill-rust/rust-proof what is left so i can work on the chassis until i find someone crazy enough to take on the job of putting new steel through it for me...
thanks for the reply, David. i thought this post had slipped into the too-hard basket... do you know of a bath? any info is greatly appreciated! i have probably bitten off more than i can chew with this project... but, who dares wins!
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Location:
Adelaide
Registered:
May 2002
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Re: Acid dipping
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Mon, 23 September 2002 23:49
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I have heard acid dipping is a polular way to strip and rust proof mini shells.
Try contacting your local mini clubs, or ones in Sydney. They should have a better idea than most.
Craig.
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Location:
Melbourne
Registered:
May 2002
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Re: Acid dipping
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Tue, 24 September 2002 01:54
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Norm,
have you considered sand blasting? I believe you can hire sand blasters. I would imagine this would be cheaper.
What is the car?
If you are going to do such a complete job consider chopping out the rust in panels and braising in new bits. I have kill rusted and have had bubbles appear a year later - very discouraging.
Good luck!
David
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Registered:
August 2002
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Re: Acid dipping
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Tue, 24 September 2002 17:55
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Craig,
thanks for the tip. i'm chasing it up...
David,
i have sand-blasted some of the hanging panels (which are in excellent condition), but i don't think it will do the job on the body. i need something to penetrate the hard-to-get areas like in the sills and pillars. it will require new sills and floor anyway, but i reckon the whole body would benefit from a dip.
the body will definitely require a lot of work. what i am trying to do is get it prepared for the attention of a good panel beater... someone who can do the floor and sills, and cut out the bad stuff that is left and put in patches. i know this will probably cost a small fortune, but on the upside i can go as custom as i want(flat floors, bigger tunnel, channelling).
the car is a '56 Mainline.
thanks!
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Location:
Newcastle
Registered:
September 2002
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Re: Acid dipping
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Wed, 25 September 2002 02:00
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Do not get it sand blasted. i had a FB holden done with the finest grit at a top line company and the job was shit.
acid dipping is the way to go but you must be sure to get it all out as it will cause problems later. they usually will not dip anything that has hidden areas where acid can sit.
i do not know who can do it for you but check out some of the restorer mags or get into some of the vintage discussion forums and ask the question.
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Acid dipping
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Wed, 25 September 2002 03:16
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There are different types of blasting avaiable! You can get a finely ground up nut shell stuff that is best for cars! Sand blasting can leave your all pannels pitted!
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Location:
Adelaide
Registered:
May 2002
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Re: Acid dipping
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Wed, 25 September 2002 04:13
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The heat from sand (bead, shell etc) blasting acn also warp panels. Many minis sufferf rom this problem.
Another option is chemical striping by hand, althought this is time consuming.
Craig.
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: Acid dipping
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Wed, 25 September 2002 07:50
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As has been hinted at already the problem with dipping can be that the dip itself will end up encouraging rust in places that have not seen the light of day since manufacturer of the car itself. This is especially true of modern cars unitary design.
hand chemical stripping is a good but also labour intensive option (as has already been said).
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Acid dipping
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Wed, 25 September 2002 13:38
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I would say that the old stripper method is the best! Yes it takes a long while but you will know where any rust spots are by the time you finish  You could also use acid where there are any joins or seams just to make sure you get all the old paint 
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Location:
Brisbane
Registered:
November 2002
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Re: Acid dipping
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Sat, 09 November 2002 10:09
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hi all,
after spending 6 months (part time of course) hand stripping my beloved RA28, i'm trying to think of an easier way for my next one. I know from experience that sand blasting warps panels (especially jap metal *sorry if i offended anyone*), and i assume acid dipping is expensive. (if anyone knows an approximate cost... tell me pls).
what does everyone think about using caustic soda on the joins and crevices, and using stripper on the big flat panels?
any other ideas?
Tim
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: Acid dipping
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Sat, 09 November 2002 15:21
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stripper should be fine as long as you make sure that you clean all the stripper away once it has done it's job.
The nut-shell blasting that Cool1 mentioned is supposed to be very good for stripping cars. Dipping is expensive and has more drawbacks than it is worth, most of which have already been pointed out.
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Location:
Melbourne
Registered:
May 2002
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Re: Acid dipping
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Sun, 10 November 2002 03:02
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Guys,
I am really starting to wonder what the point is of getting all paint off a body.
I mean if the original stuff is stuck on well it is doing its job!!!
It's only where there is visible evidence of rust underneath that is a problem.
As soon as bare metal is exposed to the air rust starts. At the factory there isn't much time between the panels being welded up and the paint job. At home in the garage once you remove the original paint and if the car sits around for weeks rust will start (even if ya can't see it).
Further, abrasive papers (or blasting) leave a rough surface which has more surface area hence more opportunity for rust. The original metal has a rolled surface off the sheet metal mill and is smooth.
A panel prepared at home is going to have lots of micro rust on it.
Do any of you advocate using (rust convertor) phosphoric acid on bare metal before using a primer? Phosphoric acid turns iron oxide into iron phosphate which does not oxidise???
If it aint broken leave it alone.
David
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Acid dipping
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Sun, 10 November 2002 06:24
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I have to agree with myself  Go with the nut shell blasting! I have blasted satillite dishes using this method and it worked fine didn't damage the metal at all!
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