my wife had the same issue with her Otter suit, we did 5 days last summer with 3-5 dives a day. It looked like huge hickies!
She found vaseline the best thing. Pretty sure that wont be do too much good to the seals though. She reckons if you are done diving for a bit (a week maybe) then BioOil has some pretty good qualities. again not sure what this will do to the seals.
The other thing to consider is next time you replace the seal get silicone ones instead, they tend to be hypo-allergenic, actually form a better seal and are much kinder to skin. My wife has done research using a silicon based dressing for the prevention of skin damage from radiation treatment. Its amazing stuff!
...and yes, she is the brains of the outfit