8 replies to this topic

[pete l]

Hi all,

 

I'm removing all the paint on the inside floor of my MPI to remove and treat the spider track rust thats under the paint, as I'm going along I'm spraying zinc primer to protect the bare metal.

 

This primer is very soft and scratches off very easily.

 

Do I have to remove it before painting the floor with 2K epoxy primer ?

 

All advice welcome

 

Pete.

[Steve220]

Not sure what the official answer is - however mine was zine primed in bare metal corners and joins (pumped in in some cases) then the entire body was epoxy primed. No reactions!

[pete l]

Thanks Steve,

 

I'm more worried about it peeling, the zinc primer doesn't seem to be very tough. 

 

I've just found a test on the internet, using sticky tape to see if it peels off.

[Gaz66]

Does it peel off?
Im using zinc primer to temporarily cover things as I weld so when I get to the painting stage its somewhere near.

[Steve220]

Does it peel off?
Im using zinc primer to temporarily cover things as I weld so when I get to the painting stage its somewhere near.

Mine never did. I sand blasted tight areas and poured the primer in.

[Vanman20]

Epoxy over bare metal is what most restorers do.If it were me I'd remove the zinc,especially as it hasn't adhered very well by the sound of it

Novol do a temporary primer that's also weld thru https://refinishsyst...24aAksoEALw_wcB

[Tupers]

What zinc primer are you using and how are you preparing the metal before painting it?

I use ZINC-182 quite often and never had problems with it scratching off of a surface sanded with 240 grit.

[sonscar]

Whatever paint system you use it only sticks as good or bad as the coats underneath it.If suspect now is the time to remove it.Steve..

[sonikk4]

I have used the same stuff as Tupers on The Red One and all I did was degreased, scuffed and then brushed on. ( that’s what Paul had at the time) and it never reacted, scraped off etc.

I used UPol Zinc Rich primer on Paddy, again same method as The Red One and applied Epoxy over that with no issues. The metal has to be squeaky clean, keyed properly then happy days.

If in any doubt about the primer, remove it completely. No point in hoping it will come good.