Practice certainly helps...
I have the mix about as thick as possible while keeping it useable through a shutz style gun.
In the future I'm going to be playing around with a new gun design to further "tweek" the results.
A couple things help with the buildups...
(most detailed in my instructions).
1. Warm temps help... cold tends to slow down the drying and allow the material to flow too smooth.
2. I like to build up a good thick base and get the basic coverage areas without being super worried about the texture. Then I'll let it sit overnight and then come back with light mist coats to get the texture perfected.
3. Light coats with the highest pressure allowed seems to work best. (60psi usually depending on the gun manufacturer).
4. Gun stop patterns are easily reproduced with a cardboard scrap used as a mask.
5. Using foam aperture tape works well for soft blend edges.
6. It's also very important to thoroughly mix the product as the textures tend to settle out significantly.
And for inquiring minds, my mixture is exclusive and not the same as the Gibson/Badalson product.
Rick