OK, caught in another misstatement.  Amazing how misinformation brings out more information.

 

First, I was wrong about water having anything to do with a good two part rollable primer.  Completely erase that from your mind.

 

Secondly, I prepped my airplane in the old days without the benefit of other's experience - so, I squeegeed the first application of WLS and sprayed the remaining applications.  I spent hour-after-hour wet sanding with long boards between coats and I don't remember it as a rewarding part of the building process. I didn't like the results over the long term (static and weave visibility).

 

Today, I am impressed with the productivity gains made in almost every industry and every corner of our lives - that includes the preparation of surfaces for painting in the auto repair business. 

 

There are at least three individuals at my airport that are actively using a high-build, rollable, quick "drying", two-part primer that results in no overspray, fills pin holes and is easily sanded.  One can go back and roll on another coat in about 10 minutes without sanding.  I heard it is sandable in about 4 hours. 

 

It appears to be expensive.  PPG 2K Rollable Surfacer SX1060 (hardener SX1061) is the product.  There may be other products that are applicable and provide good performance and productivity.

 

I cannot personally recommend this product because I have not used it, but I have seen it used and the consequent results (uh, not long term). 

 

Mike Easley said it best "When it comes to bodywork and priming, you're likely to get 20 different answers from 20 people."