I used pounce wheel from the costume shop to aerate the gels once and it seemed to work fairly well.
For me, the biggest baking problem I have is with my Altman Sky cycs, largely because I run 1500's in them and have teenaged lighting technicians.
They seem to follow the "This is Spinal Tap" method of assigning intensities.
And yes, if it were possible they would make the board exceed one hundred percent.
But they also like using the bump buttons for dance concerts so...they then realize that if the cyc is already at 100 percent the bump button does absolutely nothing.
I have been trying to get them to realize that the "keep the lights at 80 percent" is a good idea, as the director will undoubtedly ask for more light constantly if you have them all at one hundred percent, yet never if you are at 80 percent.
Oh and BTW I use sky silks in the Altmans so the diffusion probably doesn't help the early burnout I (I mean my gels) experience.
Here is the one catch with any of the three companies gel shields, the color media has to be spaced approximetly 3 inches away from the gelshield in order to be effective. So therefore, the lights with gelshield and a colored gel have to have gel extenders if you want the full useage of the gelshield.
Just remember, when using heat-shield, you must always have a gap of some sort between the gel and the heat-shield (1" or so). you just can't put both in a single gel frame, it just doesn't work. Use a gel extender / barn door (w/duel gel slots) or similar.
While it's true that the larger the airspace, the better the ventilation. But- many modern lighting fixtures (the Source Four comes to mind) have two color frame slots at the end of the barrel, intended to place a GelShield (or cheaper heat shield) in the nearer slot with the gel transmission in the farthest slot.
Color extenders will improve the ventilation, but you'll add $20-$25 for each fixture to get this extension. It all depends upon the budget and difficulty of replacing the faded gel.