Etching Primer – Brass

[R Johns 1Participant @rjohns1]

Greetings. I need some advice on etching primer for brass.

I have a spray can from autotek. The back of the can states galvanised steel also suitable for aluminium.

Do I need a different formula for brass? Does anyone have experience as internet searches are inconclusive.

Many thanks

Elmo

[R Johns 1Participant @rjohns1]

Which Primer?

[JasonBModerator @jasonb]

I tend to use U-pol's Acid 8 when spraying with a can. Halfords do it . Not used the Autotek

[Jon LawesParticipant @jonlawes51698]

I tend to use U-Pol Acid 8 for everything as well. It's really rather good. Used it on my locomotive, which was all brass. In the areas that got chipped in transit I touched up without using the primer and it really didn't adhere as well.

[R Johns 1Participant @rjohns1]

Many thanks for the replies.

I see this U-pol stuff is widely available as well. Pointless gambling on the one I have and having to clean everything up.

Regards

Elmo

[Martin King 2Participant @martinking2]

I have used the Autotek grey etching primer for a long while now and find it to be excellent, mainly on alloy and steel but also some small brass items.

cheers, Martin

[Michael CallaghanParticipant @michaelcallaghan68621]

Before spraying make sure that the brass is totally clean. I have also found it helps lightly going over the surface with a scotch pad to key the surface. Acid 8 works ok.

[duncan webster 1Participant @duncanwebster1]

I seem to recollect that the bumph sheet which comes with Precision Paints primer claims that primer meant for aluminium doesn't have enough acid to work on brass. This might be a case of 'they would say that wouldn't they', and I have little experience either way. I also recollect that the 'how not to paint a loco' book says Acid 8 is OK. My attempts at painting are best described as spreading it around with a hairy stick

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