I also found out that there is absolutely no hard Cap on Hull Damage resistance. So to get up to 75% all damage resistance on your hull, you need a resistance value of 300.
Hmm... A sci ship running max PH3, and all consoles, that get APD3 from an escort, AtoSIF3 from a cruiser, HE3 from another sciship etc. (phaps even multiple copies?) Could get close... especially if they stack