To Dip or Not to Dip? That is the Question!!

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StormUK
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To Dip or Not to Dip? That is the Question!!

Post by StormUK »

So, I am just starting out on the restoration journey and am contemplating getting the bodyshell dipped prior to any rust repair. What are people's thoughts on this? Should I get this done or should I repair any obvious areas then have it dipped/coated?

Any recommendations of the best way to proceed would be great thanks.

Mark Imp007
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Re: To Dip or Not to Dip? That is the Question!!

Post by John A Ross »

Dipping, blasting... you will kick over a wasp next on that one :-)

Depends really on how much of the car you will be cutting into. Dipping would be great followed by e-coat but the best return on that is after all reapirs. The imp has very few spaces that are completely enclosed,

If it is paint stripping there are some good commercial chemical strippers available. Same for acid etch and poshpate solutions for the bare metal that are water based and can be neutralised easy enough by dilution.

Stripping underseal, one of the most horrid jobs :lol: .

I opted this time round to not media blast the shell belly or soda blast the outside as well, I an chaning lower half wings, both floor sides and front wings, so really my money would be wasted cleaning off panels I would be replacing. The areas I really need blassted are under the external ones, so I opted for some Jenolite gel and some phos-kleen. You need to use both with caution, serious caution, nasty stuff but wetted into seams works wonders.

Are you going for full on restoration or rescue ?

I often wish I had went for rescue and just enjoyed the extra years driving than bashing metal, could have saved myself a fortune in time.

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Re: To Dip or Not to Dip? That is the Question!!

Post by StormUK »

Hi John

Thanks for the reply, also really enjoying the 'Project Doris' series. Keep up the good work!!

I am going full resto as I will be building the car into a race machine so need the shell to be as strong as possible, but also so I can build the best car I possibly can.

Mark
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Re: To Dip or Not to Dip? That is the Question!!

Post by John A Ross »

Mark

So full Resto "Mod"

I had a visit from another well known restorer/builder earlier in the week. He recommends actually replacing the middle sill with solid 1.2mm if shell rigididty is needed.It does make a huge difference, I used plain 1.2mm sheet on JDL and DDG but kept the sills the same on Doris as it was better to keep it looking as it should.

I do not have any race build experience but there is certainly a lot to think about.

Col Rooney, Mike Dent, Scott Clements (see Karens Sport and Amys Coupe rebuild) all do rebuild/rstores for a living and race themselves. Mike Hanna is worth looking up on Facebook.

Cols pages have a lot of cars "naked" :lol: and shows a lot of the normal stress areas very well which are some of the first to rot.

I am just finishing up the middle sill / passenger on Doris, outers bothsw ides will be on in short order.

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Re: To Dip or Not to Dip? That is the Question!!

Post by StormUK »

John,

I'll have a look at the rebuild posts and reach out to the motorsport 'experts' when I have specific strengthening questions.

Still unsure of the paint removal route ha ha. I think I may be swaying towards stripping using a combination of mechanical/chemicals means, facilitate my repairs then get it dipped and e-coated after. Sound good??
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Re: To Dip or Not to Dip? That is the Question!!

Post by impmann »

Dipping... I wouldn't. Too many banana cars caused by it. Also some use acid, which (despite rinsing) sits in the joints between panels and rots it back out later (sometimes after the shell has been painted). Its not cheap either, plus if anything does go wrong the finger of blame rarely rests with the dipping company.

Blasting - can be OK, depending on the media and the skill of the blaster. BUT, the mess left behind can be a pain the bum to remove.

Good luck. 8)
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Re: To Dip or Not to Dip? That is the Question!!

Post by StormUK »

Thanks for this advice 'Impmann' :D
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Re: To Dip or Not to Dip? That is the Question!!

Post by John A Ross »

Tim

Mess ? what mess ?? :lol: :lol: :lol: :lol: and that was a summer day, self generated snow, thats covering the plastic that was used on the underbelly

I had to wash every car ion the car park carefully ;-) lesson learned

Dipping done properly should be fine, those companies that do it well usually have a drill sheet for the shells. Expensive though and not worth it for rust removal I would say.
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I could have went same way with doris but with the panels that need to come off, did not seem worth it although some of the chincal stippers and etachents used are just as bvad.

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Re: To Dip or Not to Dip? That is the Question!!

Post by StormUK »

What a mess ha ha I'm surprised you aren't still cleaning that lot up now!!! :lol:
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Re: To Dip or Not to Dip? That is the Question!!

Post by moose »

Hi. Looks like that is going to be a good project. There are dippers and then there are dippers. The ones who lift the shell by the roof and dunk it in acid are to be avoided. The company that did my rally car have stopped doing shells as it was not making enough money compared to the wheel stripping and chemical supplies they were also doing. Their method was to cook the car in a large oven over 24 Hours slowly raising the temp and cooling to avoid distortion. When all the paint sealer etc was burnt off they then de-rusted the car and cleaned it in a chemical which was their own concoction but similar to Ku-rust so anything that was left in the seams and box sections was a de-rusting agent. You then repaired the rotten sections and if you were quick about it then there was very little flash rust appeared where you handled the bare metal or had welded. They gave me a litre of solution to touch up where I had welded. Due to getting a job as a world rally mechanic my shell prep went on hold for 3 years where the car sat as a bare stripped shell in my workshop. (pictures on here of the build under FFG549D) When I could get back to the build I had the same company give it another foaming Phosphor wash to de-rust then e-coated and then off to body shop. When the shell was in the nice glossy paint finish i used dinitrol in all the boxes and seams. So worth asking lots of questions of the companies before spending the money same for blasting, you want a classic car specialist or recommendations of who classic car specialists use not just a large industrial blasting company. Cost and what you are willing to pay all depends on budget. if you pay some one to de-rust the car back to bare metal with a grinder and wire wheel the labour costs will be way more than dipping or blasting. So if you do that yourself loads of money saved but very time consuming and you cannot get to every knook and cranny easily.
Regards Moose imp competition secretary
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Re: To Dip or Not to Dip? That is the Question!!

Post by StormUK »

Thanks for the reply Mike. The company I have spoken with is Enviro-strip. I believe these have been used twice by Car SOS so you would hope they were ok. I think I will maybe start stripping it mechanically myself and depending on what I find make a better decision then. Imp007
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