>>7272863>all the the vallejo air paints (incl mecha colour and particularly metal colour) have really good metallics because they use very fine aluminium powder, although I've heard the model air golds are a bit iffy. Even if you're brush painting they're the best water based acrylic metallics out there.Vallejo metallics are awful. Not as bad as mr color aqueos (the worst) or citadel which have huge metallic particles but still awful. Hand brushing water based metallics of any brand look like shit unfortunately. This is why the non metallic metal painting technique like pic related is so popular with professional miniature painters. There really isnt a good acrylic alternative. Hand painting lacquers like tamiya or mr color with a dust mask or respirator is the best option if you dont want it to look terrible. (lacquers arent anywhere near as harmful when hand brushed as it is not atomized)
