lot rot is a real thing - basically the rotors rust up from non use - the brakes may get better as you
drive the vehicle but they also may not - resurfacing the rotors might be possible if the rotors are not below min. thickness when done. If your not planning on driving the vehicle daily then this is only going to happen again. Drive it and brake hard a few times to knock the rust off but you will wear the brake pads faster than normal. If it’s not rattling the fillings out of your head just let it go until you need brakes then either resurface or replace the rotors