7 replies to this topic

[humph]

I've just spent a lot of money on half floors with the outer sills fitted for my project. Before I weld them in place what would people recommend I do to stop inside the sill & crossmember from corroding. Obiously I'll be using wax or similar in there once complete, and have already coated the lot with a good red oxide primer. Would people recommend something else, a coat of top coat or something similar?

[rodandtom]

If you've got the metal in to a good condition, put zinc rich primer in there and red oxide as well, then why not put top coat in there as well. Primer is not impervious to water over time so you need something else. With all the new panels I've put in I've done that. Then I am spraying more protection over the top if its not a visible panel. With the crossmember, I then sprayed Dynax S50 as it stays flexible. If you are welding then do that last of all.

 

Rod

[Carlos W]

Red oxide primer isn't like it used to be, it's just red primer.

[Ben_O]

There is no need for red oxide and zinc, assuming you would use proper red oxide.

 

I would go zinc primer followed by a top coat and then wax but do it thoroughly. The reason Mini's tend to rust so badly in there is because of the lack of any decent protection followed by poor maintenance after.

 

Ben

[markyB]

I have used electrox primer , top coat and clear dynax on my mates car over 2 1/2 years ago and not a glimmer of rust so far, I can't fault the products from bilt hamber

[humph]

Thanks guys, pretty much as expected there, I'll do just that.

[alchall]

When I come to mine I will paint them (zinc, etch prime and top coat) before welding then after welding I'm going to follow up with this which I've currently used in my A posts, can't be sure of it's true long term performance but it certainly does a good job of thoroughly coating everywhere and seeps nicely into all the spaces and cavities and oozes out through the seams between welds where they aren't extremely tight together. I'm hoping this will add some protection long term as it's not cheap at £19 a tin....

 

 

It looks like this when it goes on...

 

 

[spiguy]

+1 for bilthamber. Their dynax s50 product (same spray cans as the clear) is designed for cavities like this and comes with a nifty injection lance too.