Rich, It sounds not like paint but instead surface prep, that is causing  the 
beading.
Fiberglass fuselages especially those not painted in the mold will have  some 
sort of release agent
used in the molding process to get the part out and not damage the mold.  
Prior to doing any work on a new Fiberglass fuselage the part must be washed  
with  detergent and water, and then wiped with a rag that has a mild  solvent 
on 
it. Use gloves especially if you might have kids in the future. Now  get one 
of those flexible sanding pads and scuff the surface of the fuselage.  Medium 
and Fine grades should do the trick. Make sure and pay particular  attention 
where you might tape the wings or canopy. You are done when the  shine is gone 
on the fuselage. If you see small imperfections this is a good  time to use a 
polyester putty like Evercoat to fill and fair them. Now wipe the  fuselage 
with Solvent again, and mask off any areas that need to be protected.  If an 
excellent finish is required use a polyester spray primer, needs touchup  gun 
and 
compressor, wetsand with 240 and then hit with auto paint, poly urethane  
finishes or epoxy are tougher and heavier. If you have none of the above  use a 
spray can Primer misted on in several coats. Resist the urge to spray it  in 
one 
coat. Spray outside where you can see the work and not breathe the fumes.  
Preferably the next day wet sand the fuselage with 320 wet and dry to take the  
fuzz off. Suspend the fuselage long ways horizontal nose to tail and mist on a 
 color coat. Start the spray before the fuselage and release the nozzle when 
you  are off the end of the fuselage, this gives even coats with no runs. 2-3 
light  coats will prove superior to one coat blasted on. Good luck  Larry



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