Thanks for reposting your vid. You definitely have a talent there. I'm thinking back to when I learned airbrush. I think we used Friskit, not stencils. And didn't get much time to practise much with it. You make me want to dig out my old Badger and little compressor, and see what I can do.
Just to clarify, you didn't airbrush before this, did you.
2005 Canyon Red Piaggio BV200 198cc
2013 Ingot Silver Ford Focus hatchwagon 2.0L Inline 4-cylinder
6-speed auto-shift manual w/OD and auto-manual CDT (whatever all that jargon means)
(gone, but still in my heart) 1992 Seafoam Green Ford Taurus wagon 3.8L V6
Sure, no harm in stencil use. One of the premier motorcycle airbrush artists in Las Vegas uses multi piece vinyl on the more complex designs, and removes and blocks out areas as he paints.. I know, cause my shop makes his vinyls. Stenciling is just a technique, like sponge and brush combinations. It's the concept and end results that define the artist. Keep up the good work..
Stencils are a vital part of airbrushing... Aside from cut stencils, it's common to use torn paper, circle or elipse-guides, French-curves, lace, fishnet, leaves, twigs, etc. and for "fish-scales" the good old thumb or finger-tip. I find with airbrush work, I seldom work totally freehand, since usually a hard edge is needed on at least one side of the spray. I'm amazed at how many effects can be done with a simple edge of a thin piece of cardboard, either straight, or, cut to a shape! And you can vary the edge a WHOLE lot simply by holding it close to the surface for a hard edge, or moving it away for softer "ghosting". If you airbrush for a lifetime, you'll still keep finding new techniques!
Wait until you discover what you can do with a metallic underbase, and translucent colors shot over it!