Best place to find sandable primers is where AUTOMOTIVE paints are sold. If you want it in a cheap rattle can try auto parts places like Pep Boys, Advance Auto, Penn Jersey Auto, and the like. Your not likely to to find auto paints like Duplicolor at Walmart, K-Mart or other similar department stores. I seen Krylon paints at some crafts and art stores, but then you're back to hunting.
If you want excellent sandable primer to shoot through your airbrush, go to your local automotive paint supplier. Buy a quart of Dupont 131 acrylic lacquer primer surfacer and a gallon of lacquer thinner and you'll have more primer than you'll use in 6 months of average model building for way less than you'll wind up spending on lower quality hobby store primers.
John O.
If you want excellent sandable primer to shoot through your airbrush, go to your local automotive paint supplier. Buy a quart of Dupont 131 acrylic lacquer primer surfacer and a gallon of lacquer thinner and you'll have more primer than you'll use in 6 months of average model building for way less than you'll wind up spending on lower quality hobby store primers.
John O.