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MMmm an etching primer is recommended with most metals - brass is particularly tricky.I just finished the locomotive portion of the kit. I had to make some adjustments. The part that mounts the smokestack was missing, so I had to make my own version. I also used the leftover borders from the brass cut-outs to make some trim which I added here and there.
I had a hard time getting small pieces of brass rings to glue and take hold, especially on painted wooden parts. Perhaps I should glue the brass to naked, pre-painted wood? Also painting the brass was a challenge. I did a bit of sanding, and used View attachment 268546 acrylic paints, but the paint came off easily. Maybe I need to use a primer of some sort. I did experiment with a shellac, but it didn't make any big difference. So if anyone has any suggestions, I would appreciate it. View attachment 268544 View attachment 268544 View attachment 268545 View attachment 268545
The etch primer sold by Halfords is 'Acid #8', produced by U-Pol:MMmm an etching primer is recommended with most metals - brass is particularly tricky.
Humbrol used to make a plumbate (?) primer - canary yellow, but it worked with most things.
I use an etching primer from Halfords - it's OK to spray on everything, and I believe it's a US manufacture because it has a # before the number (#5 maybe ?? )