duncan_rtfm

OK, I've come up with a plan to take the pain out of sealing the ribs:

• Tell CAM that you are cutting perimeter with 6mm bit
• However, cut with 3mm bit
• Rib will be 1.5mm oversize
• Dip entire rib in shallow bath, filled with polyurethane varnish
• Use a brush to squish the poly into all the cut-outs
• Set aside on plastic sheeting to dry
• Rub down with fine sandpaper to remove fiber rise
• Dip again, set aside and allow to dry
• Then replace ribs in the CNC, re-cut the perimeter, but use a 6mm bit this time
• This will remove the excess 1.5mm all round, and present a clean surface for the epoxy to bond to

There's nothing I can do about the current crop of ribs, but they represent only one half of the rear wing.

Duncan