I use Pledge with Future all the time. Works great for what I use it for, a very smooth, glossy surface for decaling.
Pledge/Future or whatever brand you use doesn't produce a smooth gloss finish when air brushed, but rather a more of a Mat/glossy finish, which is not good enough for decaling. So I brush on the Pledge with a medium soft brush in two lite coats. Any drip or runs not caught can easily be cleaned up with more Pledge applied over it, as it's basically self leveling. I try to work level areas and slowly rotate the model so that the Pledge doesn't run.
After decaling, I apply another few coats of Pledge to blend in the decal film to a smooth coat. These coats are air brushed on. I use the Pledge straight out of the bottle at 18-20 psi. Gun type & needle size will dictate psi changes. With my setup, 18-20 psi is what I use for nearly all my air brushing.
I'll apply any washes that I need a gloss base to flow, then I seal the model with a several coats of Testors Model Master Flat (it's lacquer based) with a air brush, and it produces a dead flat finish. Weathering continues, and when completed I final flat coat with a few coats of Dullcoat.
You can also use Pledge with Tamiya Flat Base to produce a flat coat, mixed at a 10 to 1 ratio. You need to be careful as to how much Flat Base you use. Too much will cause the finish to turn milky, and too little produces a mat finish. I've seen posts on various sites will all sorts of ratios, so you'll have to work out what's best for you.
For cleanup I use Windex with Ammonia, then a final rinse in warm water. I've also used Lacquer Thinner for cleanup which works great, but you have that Lacquer smell to deal with.