BUT...back in my day, it was basically humbrol or airfix enamel paint, horrible smelly stuff that needed thinners. For this kit, I ordered all the right acrylic paints (Vallejo) and I have to say - they are dreadful! Are all acrylic paints this bad? - they don't go on evenly at all, there are visible brush marks everywhere, the coverage is terrible and on a large area they look ghastly! And it has no adhesion at all either. I've tried thinning with water and also with Vallejo acrylic thinners - no difference.
But anyway.... where am I going wrong with acrylics?
That's how they are. They dry to quickly when using a brush, better of with good old humbrol. They work much better with an airbrush, but that's very messy, you need an spray booth and cleaning the airbrush afterwards isn't exactly fun either.
A trick to avoid brush marks is to staple the paint on with a sponge.