turboheli: Assuming 'local repainting' refers to the entire blade on-site (as opposed to 'localized repainting' of a small area of the blade) be very careful. As has been pointed out here, if specific approval or procedure is not in the manual then you can't do it. Not just from a legal or procedural standpoint, but from an aerodynamic one also. The weight of the applied paint is often used to make minor adjustments to a blades 'centre of pressure' (I think that's the correct term) and has a direct effect of the flight characteristics of the blade. If this 'centre of pressure' is not where it should be, i.e. it has been moved by the additional weight of paint applied during 'local repainting' then it's entirely possible that no amount of adjustment during dynamic balancing will get the blade to fly properly. Yes, staic balancing will be achievable, but in this case it's essentially meningless. Contact your local Technical Representative and ask - that's what he's there for.