Had not thought about the obvious advantages of gel. I'll be going glass to glass or phenolic to glass on some and wood to wood on others.
Have used smooth on with good results but then there is the long wait and my "shop" (garage and patio) is very cold this time of year. :( I can do them at my bench in the garage, but that calls for hanging lights under them for heat overnight. It works, but being able to do the job in 15 or 20 minutes is waaay appealing.
Thanks for the tips. As usual this forum is a trove of quality info!