Where I currently live, a good chunk of the year is at or below 0C, and I am reluctant to use aerosol primer at those temperatures.
I decided to use my own "primer" during those temps., which is a slate grey acrylic paint from Deco-Art, which I dilute. The results are decent.
That being said, I went to a hobby store yesterday, and noticed that they had tons of Vallejo products, including the surface primer. I asked the owner of the store, and she mentioned that the primer can be brushed on or used with an air brush, so I decided to purchase it and give it a try.
I decided to do just one coat, even if it looked as if the surface of the figure did not have much or any primer on it... I wanted to see how just one coat of brushed on primer would do in getting my paint to stick to the figure.
I am really happy with this product!
The one coat of primer kept tons of detail on the figure, and my paint held up nice, with not flaking, etc...
Now, no more wondering if it is too cold or windy out to do any aerosol spraying!
Agreed, the Vellejo brush-on primer works very well. Unfortunately, 'tain't cheap. So I've adopted practice of massive deflash/sand base bottoms smooth/wash/prime in every Fall and Spring - this season's recruits ready to take outside and spray away (pictures coming)
Back in the last century, when primed my figures with brush, found that the best brush-on acrylic primer was created by mixing half-and-half Floquil Gray and Pactra Red Oxide primers. Only drawback was it left primed figures a hideous shade of purple-pink...