The rubber seals have to stand up to brake fluid, so they should be fairly hard to damage with any lubricants. But you have to be careful to not contaminate the brake fluid, so I have just coated the seals and bore with brake fluid to install. If the bores have rusted enough to sieze the piston, you will probably have issues with leaks and sticking when the pads wear down some. (been there done that with factory Ford 4-piston calipers, next step will be to get the stainless steel ones)
Bill M