Stan -- You've received several good responses to your original question -- whether it's a good idea to use heat to speed up Arm-R-Seal's curing. Allow me to address a question you didn't ask: Is Arm-R-Seal the 'right' finish for the bowls you're turning? Generally, I prefer to use film finishes, such as lacquer, shellac, and polyurethane, on decorative pieces. For utility items, I prefer a penetrating oil finish, such as BLO or walnut oil. Utility items get handled a lot. My experience that items with a film finish quickly look 'dingy' when handled a lot, while the same item finished with oil just develops a 'nice patina'. And, when a utility item needs it's finish refreshed, that's generally easier with an oil finish than with a film finish.
For these reasons, it's been a long time since I used a film finish on a bowl. My general practice is to wet sand the bowl with walnut oil. By the time I've sanded through the grits, the bowl has had its finish applied. You really can't get much quicker than that.
David Walser
Mesa, Arizona