What to do before welding panel on

[Mags]

I've been searching and reading loads of threads but can't find the exact answer I'm looking for so here goes.
I've been repairing a VW camper front door and I'm almost ready to weld the new skin on, but have a few questions first.

Where I've been welding a new lower frame section on I've just sprayed zinc rich primer straight over this, but I know this is porous, so what should I coat the entire inside of the door with before it gets exposed to the weather again? I was thinking of zinc rich primer all over and then a laquer to stop moisture getting into the primer?

I'm almost ready to weld the new skin on, it requires a lot of plug welds all round the edge of the skin so I was planning on using weld through primer on the edges but once welded I will have surfaces that I can't get to anymore with only the primer on suseptable to moisture, other than waxoiling the inside of the door what else can I do? Moisture can still get to the unwelded parts of the skin/frame, can I do anythign about this?

Thanks

Mags

 

[dunsdale]

we try not to weld skins on these days for that excact reason you mention.

You can bond them on using any decent bonding sealer this is how most bodyshops do it.

Sometimes you have to weld some parts usaly round the window frame if there is a specfic flange that is spot welded.

But there is not that door's like that. if so you can still bond on the main area of the doorskin.

 

[Mags]

I wasn't aware of that, can you suggest a type of sealer? I guess I'd need to have enough clamps to hold the skin in place all over to give the sealer time to set, do they take long?
And, yes I'd still have to weld where the skin joins the window frame as the skin doesn't include this part.

Thanks
Mags

 

[tux]

Something like Sikaflex or Tigerseal is what you want.

http://www.u-pol.com/countries/en/downloads/tds/tigerseal.pdf

Sorry can't find a data sheet for Sikaflex!

 

[Robotstar5]

Sika - plenty of info!

 

[Mags]

Interesting, is this suitable for the sort of skin the VW has then? It doesn't have to be folded around a lip like I imagine most car doors do, it just has a 90deg L shaped edge that sits on the same on the inner door/frame.
Mags

 

[tux]

Trust me, it sticks like poo to a blanket!