A few years ago I airbrushed Tamiya Smoke on the inside of the Revell Indy canopy. If you've built that kit it's a big clear bowl.
Did it on the inside with many many applications of very light coats applied quickly. I would do one pass and then allow it to dry completely before the next pass. The paint of course wanted to pool at the bottom of the bowl. After I was finally finished and satisfied with the colour it was lightly sanded to thin some runs and remove dust specs then polished. Time consuming but the results were satisfactory.
rob w