Cold galvanizing spray primer

judderod · Post by **judderod** » Mon May 28, 2012 9:44 am

Anyone used this for bodywork?

Looks like it might do a better job at holding back rust than acid etch primer.

Something like this: http://solutions.3m.co.uk/wps/portal/3M ... ZincSpray/

jozefsan · Post by **jozefsan** » Mon May 28, 2012 10:09 am

its zinc primer, difference between zinc and a etch is bonding to bare metal. acid etch will bond better then zinc primer. lot of people use etch first and then high build primer or anti-corrosion primer over.

Confused · Post by **Confused** » Mon May 28, 2012 1:00 pm

Zinc primer will allow you to weld straight through it without having to scrape it away - I'm using it on all the new bits of metal I've put on the Anglia because I can't guarantee I won't have to weld over it again!

That reminds me, I need to pick up some more tins of it, I've been using the David's Zinc 182

judderod · Post by **judderod** » Mon May 28, 2012 4:19 pm

jozefsan wrote:its zinc primer, difference between zinc and a etch is bonding to bare metal. acid etch will bond better then zinc primer. lot of people use etch first and then high build primer or anti-corrosion primer over.

I don't get that. I thought the zinc would need to be in direct contact with the bare metal to provide any corrosion protection?

I used to have a car that wasn't galvanised. As soon as a stone chip started to go rusty, I could see it get bigger each week!

Wouldn't it be more like standard to galvanise directly to the metal

Steel | Zinc galvanisation | Primer | Top coat/s | Lacquer

Post by **RattyMcClelland** » Mon May 28, 2012 6:04 pm

Just use Bilt Hamber etchweld. Its can be used on welding and is an excellent etch primer.