Folks

To those of you who are paint experts, I could use some advice.  I am about to embark on final paint of my lnc2 fuselage.  The thing is, I have been flying in WLS gray primer for nearly 3 years.  I had initially planned to sand out most of the primer and apply a fresh coat before shooting jetglo urethane.  I had 2 liberal coats of primer on before I started sanding. Well it seems after degreasing and wet sanding the primer appears to be in fine shape with some minor touch ups required where I cut into the filler.  There appears to be no weathering or chalking on the remaining primer.  So my question is, with 300 hours in the air and about 10 days total outside in the elements would I be able to get away without a new full primer coat?

Any advice would be greatly appreciated

Thanks

Tom Gardiner