I had a similar problem using brass black (or as near as I could find in Spain) and found that the "brass" plates have some sort of coating that prevents it blacking. I sanded off the coating on the few stanchions that I used on the bow (I bought others for the rest of the ship). The other parts, like ladders and bow decoration I painted anyway.My first attempt at blueing...not too successful. I'm not sure what I was expecting it to look like, but this is very uneven. I want my Endurance to look quite weathered like in its last days, so I thought I'd try dulling the brass. Luckily I have another set of the brass from OcCre. Any thoughts on what I did wrong or if it's salvageable?
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