I've been busy researching and testing out some weathering techniques. Love the Gunmetal black for metalic finshes. Also the 21T hoppers are my first experiments with Humbrol Clear and Decalfix for scratching effects over a base coat of rust. This is shown on the Humbrol Youtube channel, but I used enamel paint rather than acyrclic to start with - which didn't work. Then I used Tamiya acrylic as I live in Germany and can't find Humbrol acyrlic, which wasn't great but worked better than the enamel.