At this point in the construction, I like to apply resin to the inside of the hull.  The resin serves several purposes.  It water proofs the inside of the hull.  It provides an excellent surface to apply paint.  But the most important role the epoxy performs is support.  When you glued the planking together it is highly unlikely that every plank was glued at it's entire length to the plank next to it.  There are areas where the planking is not supported.  This lack of support can be found either down the length of the plank or where it was glued to the frames.  By applying resin to the inside of the hull it bonds the planks and provides support.  This support will be needed when you sand the hull to contour.  IF the planks are not supported, they will move during the sanding process and will not allow you to make a clean, smooth surface.  Any large gaps should be filled with filler or epoxy mixed with micro balloons       

first before you apply the resin.  I used Pacer Technology's Z-Poxy Finishing Resin for this.  Then I followed this up when dry with some paint.  I had some extra grey paint I used. 

NOTE: Although painting the inside of the hull is not required, I do think it gives the model a more finished look.

IF YOU DO PAINT THE INSIDE OF YOUR HULL, REMEMBER TO REMOVE THE PAINT BEFORE GLUING ITEMS INSIDE THE HULL.  THIS CAN BE DONE BY SANDING THE AREA.  FAILING TO DO THIS WILL PROVIDE YOU A WEAKEN GLUE JOINT!