Helmut,
The paints I used where mostly Testors enamels mixed to the aproximate consensus of the u-boat colors, I used a mix of enamel paint,pastels and acrylic paints for the weathering part of the build. There are some terrific weathering pigments kits in the market right now and will make the weathering job a much easier and accurate despiction, but from some time back my hobby budget has been quite in the negative side, so old school thechinics are the way to go for me!!