Red residue on photo etch

General Discussions
1

I am building Tamiya’s Cromwell. I busted started it and I decided to add eduards PE set (mainly for the mesh screens) to jazz it up. I am building up the smoke generators which are really well designed. The PE sheet has this strange red residue on it that I have never seen before

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IMG_47103024×4032 2.79 MB

The PE set is quite old (1997), is it some kind of corrosion or oxidation? Do I need to clean it off before building? It is only on some of the PE and only in parts that seem to be made with some relief to them

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2

Most likely just a little oxidation and some surface prep solution or light sanding should take care of it.

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3

It looks like it’s only on partds that have been doubled etched, giving them extra detail.
Looks like a brass and copper composite where the brass heas been etched off.

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4

Good call, this sounds likely the parts with the red are indeed ones that have extra detail like bolt heads or rivets

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