Due to my constant frustration with the falling apart of my metal/plastic Rubric Marines, I've decided to start building some pure plastic ones for the army that has served me well over the past few years. I understand that you can do this with some Khorne Berzerkers and some green stuff but I'm not sure how much work actually needs to be done (apart from the headdresses, I understand that much). Does anyone have any links to tutorials for modelling the details, etc, with green stuff or advice to offer?

Thanks in advance.