OK...here is a part that I am making. Here is the mould. I did it with the EC gelcoat and paste for high temperature, anticipating that I could then use it for hand layup and prepreg. I am making my first part by hand layup (because I need to check all dimensions are good at the end). But man it was a mess with all the shapes...do you guys think that I would really be better with prepreg or would it be just as hard ?
Thanks !

As I would consider it possible done with infusion, it should be possible with prepreg with the help of a heat gun. I would definitely not do it. I would cut out the middle bump for the first layer, and do it with a second piece with a 1cm overlap. The next layer than leaves out the 1cm overlap section. The third one again with overlap and so on. This looks like a small car interior part. 2mm would be way overengineered for that.