Posted for "John Schroeder" <jschroeder@perigee.net>:

 On our ES, we used the leftover grey fuel cell primer on almost the entire
 floor and baggage compartment to seal the prepreg. It flows well and dries
 to a hard, very smooth surface that shows anything and cleans up with any
 solvent. You can probably buy a gallon from Lancair.
 
 Cheers,
 
 John Schroeder