RE: lightning bolts and wing numbers on j3 1/3 scale cub?
If you can't find correct scale decal/stick-on letters and numbers for the N-number on the wings, you are faced with masking and painting them on. Balsa USA produces a 1/3rd cub, I should think the could supply the numbers. I would mask and paint the lighning bolt, as most decals I have seen for this are not done correctly.