What some have done for facial scars, moles, bumps, etc, is to soak a band
aid with castor oil and apply it to the problem area. Many have had
success in clearing them up. See the link below for a CureZone testimonial.
This stuff is ugly to get if off of anything. I was doing castor oil packs
and inadveretently got a few drops on a pair of sweat pants. I've pre-wash
sprayed and worked the spots, they've been through the laundry twice, and I can
still see the castor oil. But the benefits far outweigh the
downsides.