Primer/Topcoat question

Jonewen413

Member

Posts

45

Location

Elgin

• Mar 7, 2019

• #1

I rubbed down my body cappings and treated the pitted rust with Hammerite "Rust Beater" grey primer, however the weather turned awful and I had to put the landy back together before I could topcoat. I primed on Sunday and it's been raining for a couple days. Will the grey primer absorb water or will I be okay to rub down the primer and top coat this weekend? Thanks.

 

R

Ratae

Well-Known Member

Posts

3,272

• Mar 7, 2019

• #2

Technical Data Sheet for the product here:
http://assets.an-platform.com/publi...te_2.1_prep_no1rustbeaterprimer 2018 rev2.pdf
I've no idea whether it will absorb water or not so probably best to assume it might & warm the surface with a hot air gun or similar.

 

Jonewen413

Member

Posts

45

Location

Elgin

• Mar 7, 2019

• #3

Ratae said:

Technical Data Sheet for the product here:
http://assets.an-platform.com/public/tds/hs/za/en/7_hammerite_2.1_prep_no1rustbeaterprimer 2018 rev2.pdf
I've no idea whether it will absorb water or not so probably best to assume it might & warm the surface with a hot air gun or similar.

Click to expand...

I had a look at that but could see no sign of anything relevant to the primer being porous. I was just curious incase there was a limit to how long you could leave it before top coating. If its a rust inhibitor id hope it wouldnt matter. I'll heat it up before painting. Thanks.

 

potus

Well-Known Member

Posts

2,163

Location

South Devon

• Mar 7, 2019

• #4

I believe most primers will not prevent water reaching the base metal, have primed cappings before and yes they did rust through the primer before I applied the topcoat. Best get a topcoat on as soon as you can.

 

Dippypud

Never Knowingly Understood

Full Member

Posts

68,378

Location

The Wooly Witch

• Mar 7, 2019

• #5

Get a zinc chromate based primer ...

Edited to add ;
https://www.rustoleum.com/product-c...d-coatings/7400-system-zinc-chromate-primers/