I’m no expert, but I understand that the galvanising on the surface should be able to cope with minor scratches without impairing its ability to protect the metal beneath. Have a close look, it may not be that the galvanised coating has been actually removed but maybe just ‘polished’ by the movement of the dies in the stamping machine. If it appears that the galvanised coating has actually been removed, then I think those scratches may be too big for the residual galvanising to protect.

There are ‘cold galvanising’ paints available, not sure how effective they are though.

I have some galvanised items like that which I have rubbed back around the area of the scratches and painted with a zinc-rich grey primer then painted over with a silver paint similar to the appearance of the galvanising. Seems to work ok, certainly looks reasonably good, and have lasted a couple of years so far without any rust appearing.

Hope this helps.

If  you’re not happy with the condition as supplied, Elvis made a song about it – – –

regards  Ian.

I think the scratches will not affect the long term finish,they are unlikely to be right through the zinc. A decent paint finish will give you extra protection and look good.

Modern industrial roofing is very thin galvanised steel with a plastic coating, and when it is cut, nothing is needed to protect the edges of the sheets.

Decent galvanising paint spray paint comes in a tin much (like double) heavier than ordinary paint. We have Rustoleum over here with 86% zinc. Shaking the can will give you quite a work out.