Yes, it needs to be filled. This is a common sense problem, Prototypes The state will affect the FRP mould Surface effect. Don't think that the mold needs to be polished, you can be perfectly right, as shown in the figure above: originally, you only need to fill it RTM wax Right at the seams, but now you need more time to deal with this bad situation.

For the butt joint of RTM wax piece, you can use putty or wax filling, etc., which can be used temporarily and effectively, especially in the corner of some prototypes, you need to operate carefully.