The worst enemy of your Corvettes brake system is water. Water in the lines causes them to rust. Rust can work its way into the piston bores and begin to work on the anodizing on the pistons. When this happens, its only a matter of time before the calipers will have to be repaired. Once the rust gets under the seal, theres no way to keep it from leaking. This is the main reason its so important to keep good fluid in the system and to change out the fluid annually.