| I believe, Kiltz is oil based... and yes it is thick...
 Personaly, I use Zinzer, shelac based, ,it is thin and if your not carefull it will run....
 
 Any good primer will do,  it's all about your sealing/priming/painting system and what works best for you...
 
 a light sanding may be desireable with some primers, what your trying to a chieve is a bond between the sealer/primer and paint....  try differeant things and go with what works best for you.
 
 your finish will only be as strong as the weakest link.
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