I'm a great fan of Vallejo paints, and their Model Air acrylic metallics are excellent. Since this is recommended as the perfect primer, I thought I'd get some. It's a major disappointment all round, I'm afraid. Though it claims to have great coverage, in reality it seems to have great trouble actually staying where you put it, and tends to pool around details – this is using it with an airbrush, and very light coats. Even after 48 hours of curing time, it scratches off at the slightest provocation, and pulls off with masking tape. In fact, the only thing it seems to want to bond with, is Vallejo liquid mask – an otherwise excellent product, but this primer doesn't want to let it go, which defeats the purpose. To summarise, I will continue to use Vallejo paints, as I find them to be versatile and excellent, but I will never waste my money on this particular product again.