Brake Caliper Disassembly

Use compressed air to pop out the pistons, but catch them in rags....then use a bluntish, plastic pick to get the seals out without damaging them.
You will need brake-cleaner to get the assembly lube off....and you will need assembly caliper lube to put them back together.
I use silicone grease ( SuperLube ) on the caliper slides.
Make sure mating faces for mounting are not covered in paint/plastic-coating.....they will come loose otherwise.