both the (i guess this is correct velcro terminology) male and female side of the velcro pads have a self adhesive backing. i just cut small squares of sand paper in a square, stick it on, and trim the excess with scissors. if it wears out eventually, ill just grab another pad and repeat the above. with the opposite piece of velcro, i stick it to the toothbrush and it stays quite handily. ive used them extensively (mostly on hobbycraft and revell models
) and have yet to wear one out. i guess you would have to replace it eventually though. the velcro makes it easier and quicker to change out is all. plastic is not too tough on auto sand paper. anyway, let it rip tater chip, if you like what you got, i absolutely love it!!
heck, i like that foam idea as it would probably conform to curves and such a little better than the velcro. i may have to have it your way too.
thanks, later.