Citadel Colour paints are great because they adhere well to plastics. For example, the Citadel paint line works better with plastic miniatures than hobby color acrylics. A simple way to achieve this quality is by using GW's thinner before applying the paint on your projects since Citadel lives up to its name of being a good choice for painting Citadel Miniatures. If you want something that will dry faster while also achieving smooth surface transitions, I think Vallejo Game Colour offers an amazing finish which makes them ideal for airbrushing. For fine details, it is necessary to have thinned paints for any possible effects since thick coats will only obscure these parts and make them look like blobs.