orange peel is fluid control
runs are air pressure control.
how good you are means nothing when changing to high solids. whole new animal. up your air 5 lbs and back off just a little. if your gonna run it run it to the ground. a sag is flow hitting a dry spot.
rust defender is a great product. but spi epoxy will give you the same results for less money and is much easier to use. i used nothing but epoxy on this car and it was a disaster before i started.
i prefer a reflection of an 8ft tube.you have to have the reflection or you cant really see the pattern. put lights along the top of the wall and one in each corner.
set it on some blocks ( cab side ) . put paper down first. you can walk around and shoot everything standing up.
one guy i worked for in the 70's hung the bed upside down. sat on a shop stool to paint the inside.