My first Lancair (LNC2) was finished in 1992.  I used WLS primer and it was painted with PPG basecoat clearcoat before first flight.  I did need to modify the cowl after paint which was a pain, but more important, when the plane was 3 or 4 years old ripples started to appear.  Also if you hilighted some areas you could barley see the weave in the glass cloth.  I believe that was caused by shrinkage of the primer.

 

On my second Lancair (LNC4) which was also primed with WLS did not get painted for about 8 months after first flight.  The beautiful paint job (Brad Simmons) is now 8 1/2 years old and does not show any ripples or glass weave.  It still looks great.  I believe that letting the primer cure for 6 or 8 months is the way to go

 

Tom Byrnes Lancair IV N54TB