Using two-pack etch primer.

Fairlie

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I have got some Phoenix-Precision 2-pack etch primer. The preparation instructions clearly say "Do not abrade". Does anyone know why? The brass I intend to use it on is slightly tarnished/oxidised. Surely it would work better if cleaned back to bright, or doesn't it matter? Any ideas, anyone?
 
I used this on a nickel silver kit body, and had already abraded the surface before buying the primer.
Never having used etch primer before, I can't tell if there were any adverse effects.

However, perhaps I didn't use it properly, because subsequent painting and masking brought it off in pieces, leaving patches of bright metal.

I've since used Halford's U=Pol #8.
This is very popular, although their website says it will not adhere to brass.
 
etch primer has an acid base that bites into the surface,,, maby it dosent bite aswell into shiney metal,,,
 
from my experience from spraying landrover panels (birmabrite) Dont clean the metal
spray the etch primer straight on to it.
 
Is it refereing to the surface to be painted or THE COAT of ETCH PRIMER, abrading the etch coat is a real no no.....
 
Unless it is very badly worded, it definitely refers to the surface. It mentions not rubbing down the etch coat later on.
 
Ok. interesting...... in which case I would just ensure that there is no grease, oil or ANY contaminents on the surface. I'd wash it down with lint free cloth dampened Acetone and wear gloves....
 
I'm told, I haven't proved it, that etch primer can take up to a fortnight to "attach" itself fully.
 
Yes the etch primer I use instructs to apply the top coat within 2 hours of application of the primer and allow 36 hrs to "cure' before use.... So presumably the reaction takes place as the coats dry....
 
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