25 replies to this topic

[DiscoDarren]

Be mindful about the electricity draw when using a spot welder. Ive never used one myself but I know the pull a lot of amps.

Oh, never thought of that. My new mig occasionally trips the 32a breaker for the garage. It's a Lincoln electric compact 185, quite powerful.

[Steve8274]

Hi
How many panels would the eBay link spray? Just so I know how many to order.
Thanks

[Ben_O]

It covers well but it depends on how many coats you put on.

 

As a guide, i used it to prime the inside of my floors minus the passenger front pan (needs replacing) and also the outside of the bulkhead and i used two cans. That did about 2 decent coats

 

Ben

[M111OWW]

Sonikk, I too have found traces of rust under the black e-coat of Heritage panels. That's been most apparent on the replacement door step panels that have the upright 'A' pillar attached.

I can't honestly believe BMH would allow this to happen, quality control anyone........

I'm fitting genuine panels to remove rust, not add to it, especially at the high cost of these panels.

I have photos of the rust that I will be showing Mini Spares on Saturday morning, doubtful they will be able to do anything as I found the rust after fitting the panel. It was only when I came to prepping it for paint the rust showed its self.

Now what??

[Ben_O]

Sonikk, I too have found traces of rust under the black e-coat of Heritage panels. That's been most apparent on the replacement door step panels that have the upright 'A' pillar attached.

I can't honestly believe BMH would allow this to happen, quality control anyone........

I'm fitting genuine panels to remove rust, not add to it, especially at the high cost of these panels.

I have photos of the rust that I will be showing Mini Spares on Saturday morning, doubtful they will be able to do anything as I found the rust after fitting the panel. It was only when I came to prepping it for paint the rust showed its self.

Now what??

If you are worried about rust in the e-coat on the underside of the panels where you can no longer access then the only hope you have without removing the panels is to get as much zinc inside the box section as you can.

Zinc will partially sacrifice itself to kill any traces of rust that remain.

 

Ben

[sonikk4]

The problem with any coating is how good the actual metal is underneath to start with. It takes very little moisture, even the moisture from a pair of hands for rust to take a hold.

I have virtually every panel needed for my clubby in the roof of my garage and will need to take it all down to check for spiders tracks. All Heritage as well.

[dolph]

Zinc coatings only work properly if they have direct contact with the metal. If you apply zinc on top of etch etc then your wasting your time.

Zinc is good for forcing into seams but there are better products for covering complete panels

[M111OWW]

I've rubbed it back to metal and applied 'MIPA Zinkspray' then a decent primer, base coat metallic green then a good single pack aerosol lacquer. All this work will never be seen as it's all buried inside the sills, but at least I'll know it's the best I can get it.

I'll just have to put up with a little localised burn off where the outer sill was MIG plug welded in place

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[StewartB]

Just looked up this topic going to give the SAS stuff a go, just for reference i had a shop about and found you can get 6 cans for 18.29+ vat here: http://www.workshopp...spray/VANSAS24/ just for anyone who has alot of bare metal to cover, or likes a think coat 

[JonnyAlpha]

Ive just finished researching epoxy primers following someones advice on here, and am convinced this would give best protection as long as cereful prep is applied. Zinc rich expoxy primer over all bare metal. Epoxy mastic primer to underside with stonechip over followed by topcoat and epoxy primer to outside of panels before hi build primers and top coats. I did call the epoxy supplier to ask whether their zinc rich primer is ok to weld through and they said it was fine as long as it was not applied too thickly.

Thumbs up for Epoxy (May have been my thread or at least one I contributed to?). Just put two light coats of Jotun Jotamatsic 87 Epoxy on my Subframe its already had a few knocks carrying in and out of the garage and it has not chipped - strong stuff!! 

[JonnyAlpha]

Just to throw something else into the mix, I was reading up on Weld Through Primer over on the Mig Welding Forum, a lot of guys are recommended Copper Rich Weld Through Primer over the Zinc stuff but only for mating surfaces that will be welded together.

 

I had been buying U-POL #2 from Halfrauds, I did a search on Google and found they also do the Copper version so I jumped into my car off to Halfrauds and all they had was the Zinc stuff so I am back on the Zinc.

 

The benefits of Copper is that (So I have been informed) it does not give of such a toxic vapour when welded? It also (apparently) produces better welds?