Correction of wingtips part 5 - Blending in wingtip trailing tip fibreglass inserts
I have found that sanding multilayer fibreglass is much easier than slightly flocked epoxy, so I will construct the bottom layer - particularly the right hand tip - from a free-standing sheet of 4-layer fibreglass

Left hand

Right hand - a little filler needed to raise the surface

Right hand

Right hand - not much additional filler required

I will use a sheet here rather then fill the whole space
This post is from Adam Dickson