Allow me to answer for Willie.
After all, I'm the one who bought the clippers for TSA.
I think the one you linked to will do the job.
And yes, I guess the larger gap between teeth is important, a clipper for human use is much finer.
You'll need some practice ,and after a few minutes you'll get the hang of it.
I used my Infinity airbrush, but any other will do as well.
Just thin down the paint enough and you're on your way.
In my opinion, you can even use spraycans...just use some variation of colors and be carefull for exposed foam. (it will melt)
The details can be done with the AB then.
Hope this helps.