No Problem, There a few things you can do differently but in general its just about knowing the tools and how you use them airbushing is another you can use for ribs/dirt etc
I'll encourage messing about with the different tools. backup your work firstly then just mess about safe in the knowledge you have a back up this way we can develop a better understanding. if we roll with the fear of messing up we remain cautious and don't develop our understanding to the degree.
Like driving a car for the first time, books have shown us how, but sitting there with the instructor for most people thats a sign to turn cautious mode on, Its only later when we develop more confidence and start seeing the instructor as a friend or a mere routine that we drop the cautious guard and actually start learning faster
So with repaint/skinning go for it whats the worst that could happen?