i also use merderma on my scars.
whatever you do - DON"T RUB OFF THE SKIN AROUND THE SCARRED AREA!!! i was so excited to was my left foot after post-op week 4 that i cleaned everything!! top and bottom of my foot - took off all the skin that was flaking off - even the skin near th escar - and it keloid as it healed!!! so ugly. the surgery got that foot was doen on 02/27/03.
but for my right foot (done 06/05/03) i was able to wash it at post-op week 5. this time i only cleared of the dead skin on the bottom of my foot and between toes. i decided to let the skin near th escar fall off naturally. after showers, i'd gently pat the area (make sure you don't accidently tug at any scabs that might have formes). then i applied the merderma. what a difference!!! the scar on my right foot is minimal. gonna have to do some work with my dermatologist for th eone on my lef tfoot.

hope that helps!