i currently have vip+ and my question is do i lose my vip+ skins (cant equip them etc,) or do i keep them and be able to use them even if i my vip+ ended?
You don't lose them once your rank expires, they are kept unlocked on your account. However, you will not be able to equip them until you buy the rank again.
Also, if you don't plan on renewing your subscription to VIP+, you can sell your VIP+ skins/jihad sounds for points even after losing the rank.