i'd use Mepilex pads to cover before a band aid..i've used mepilex thin pads..comes in 4" x 4" pads..i cut into 12 smaller pieces...make sure your relieving pressure,n doing weight shifts...
I put 2 pillows on top ea over bed,n pull up sideways to them in w/chair,lower arm and lean over for 20 min or so then turn around n lean other way..great way to relieve pressure on ischials(sitting bones) and your neck/shoulders as well.
good luck