dont chince on the seal kit, if you are going to tear them apart any way you might as well do the right thing
all the seal kits i have ever recieved from Yamaha or Suzuki come with plenty of that lube for the seals,
many of us prefer to just lube the seals and pistons with brake fluid
the monkey has some good points in his post, especially on breaking the stuck piston loose- use the hydrolic system that your brakes are to be the power you need to free the pistons.
i disagree on the compressed air thing, although seems a valid point about the oil in the compressed air- i just have never heard of it, with proper measures taken to keep the pistons from going into orbit or thru your forehead-compressed air is a great
resource when working on brake calipers
whatever you do, dont push your pistons out of the cylinders untill they meet each other in the middle- its very hard to move them again without damaging them- i wont tell you how i know
remember, brake fluid is exellent paint remover