Oh Man!
Good luck re-assembling, is there an orthographic blow-up
online?
Here's the deal with pressure......I always used a double-action,
or a spray can. i've never used a single action airbrush.
I vary the 'air-pressure' and the 'flow' with the trigger to accommodate the viscosity
of the fluid I'm trying to apply. I never actually know what the real air pressure is
at the spray tip, it depends entirely on the thickness of the paint.
I've been using an old Badger compressor for years, it's built
like a Sherman, shook a chimney off its foundations one day....lol.....
I use both siphon and gravity feed. Siphon for aircraft carrier hulls, running out of
paint on a big job is worth putting a needle in your own eye for......
just so the physical pain matches the "I phuqued up" pain.
i use gravity for small projects, or repairing bullet holes....lol....
I have a 1/4+ hp fan & paint hood, I think it is pulling about 300 cfm,
which is handy for the fumes and over-spray.
Here's something you might want to try;
Get some cheap paint you don't need and thin it out about
2:1 or so depending on the viscosity. You can get thinning ratios online
I think; Alclad is very, very thin, ready to spray. Or as I say, the
most expensive paint thinner on earth.
Set up a test surface with newspaper or plain craft paper
and practice:
1) your paint stroke:
a) always keep the spray 'cone' perpendicular to the surface, that means the wrist
acts independent of your fore-arm, always keep the barrel 90 degrees to the surface.
b) practice the optimal speed on the stroke to get a nice coat
c) never start or stop the stroke while the 'cone' is on the project, so start spraying
before you hit it, and like a sprinter, spray through the finish, let up after the cone has left
2) practice with any pressure flow, push the cone into the surface until it is obviously liquid and makes
centipedes, then move back out until you are wasting paint. You get a feel for seeing the paint hit the target
almost 'dry on contact'. -That's the Yogi Berra 'theory' part
Spraying a surface with the brush at an angle is only good for filling in the odd bend or hole, but again,
practice moving the brush around and try to keep the 'cone' face perpendicular to the target surface at all times if possible.
Rich, patience is your best friend. You have those motor challenges, but practicing really helps.
Don't want to break out the air brush just to practice?
Get a nice big pice of paper and tap it down to a flat surface, a table, a wall, anything.
Get a nice big pencil, and grip it as you would an airbrush. practice going from side to side in straight lines while always keeping the pencil 90 degrees, totally orthogonal to the surface.
Then, practice dropping the pencil down onto the surface to draw a straight line, and lift it at the end.
You can draw a target: drop the pencil, slice through the target, the lift after the slice is complete:
just like reality when you are painting.
I recommend drawing those straight lines back and forth until you have cut close to 200 lines, then rest, but always stop if it starts to hurt. You don't need carpel tunnelitis to add to your list.