Retail primer for diecast aluminium?

Question

I have two outside lights made from diecast aluminium/zinc (aka Mazac) where the paint has come off in big flakes because the primer (in any) has not adhered to the metal. I have used a bead blaster at work to clean off the white powdery surface back to bare metal. Please can anyone point me to a source of etch primer that I can use to get a good key into the metal surface. Ideally this would be brush or aerosol applied.

I only need small quantities so a retail source would be ideal.

TIA

Bob Minchin

The Natural Philosopher · Accepted Answer

Try Halfords...I THINK they do a metal etch primer.

fred · Answer

In article , Bob Minchin writesKnew I'd seen it somewhere . . . . . but single pack it 27quid for 5l :-!A quick google reveals many sources of 500ml tins, but mainly fancy stufffrom International & the like at 16quid.I notice from a technical sheet on it that it uses phosphoric acid as theetching agent, the same as is found in Jenolite rust treatment, could thatbe a cheap alternative to the real stuff?

Andy Dingley · Answer

Marmite is made with caustic soda, but I don't suggest spreading thaton your toast.--Smert' spamionam

fred · Answer

In article , Andy Dingley writesIt's the etch we're after init, does it matter which source of phosphoric acidwe use for it :-?ps: I'd rather gargle with the latter than have the former anywhere near metoast :-0

Dave Plowman · Answer

So it's the same acid as used for etching steel?

Retail primer for diecast aluminium?

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