Galvanised garage door

[billm]

Hi,
I have a galvanised up & over garage door that is flaking in places so I'm going to sand it all down and feather in the bare patches. Then I will need to etch prime the bare galvanised areas before going over it all with white gloss.

What etch primer should I use ?

 

[dcdec]

De-grease the bare areas first.

Last one i did i got some zinsser 123 tinted to match the undercoat

 

[TheDec]

If you look at the galv if it has a sort of shimmering effect it will indicate that the door has been etched.

Dec

 

[jondecs]

Hi,
I have a galvanised up & over garage door that is flaking in places so I'm going to sand it all down and feather in the bare patches. Then I will need to etch prime the bare galvanised areas before going over it all with white gloss.

What etch primer should I use ?

Carefull you don't rub the galvanising too much , you could break through to the steeel and rust will form very quickly

I use 123 like dcdec.

 

[billm]

If you look at the galv if it has a sort of shimmering effect it will indicate that the door has been etched.

Dec

The previous coat of paint has stuck to it .. but only peeled in 10 or so places so I assume those areas need priming ?

Sounds like the 123 stuff is what's needed after a light rub down to feather the peeled edges ?

 

[TheDec]

You would be fine to apply your 123 over the exposed areas.

Dec

 

[billm]

Great stuff, thanks for the advice guys.