Ok, this may be a very obvious or just something that varies from boat to boat. But what are some of the options when removing and adding bottom cote to the area covered by the pads the balance the boat on its cradle/trailer.
If the boat is on a trailer or cradle as you allude, then your best option is that the next time you pull the boat out of the water (trailer option) is to leave the boat a little further aft on the trailer thereby exposing the areas you didn't cover the last time. If the boat is on a cradle then I imagine that a travellift put it there. Again just have the operator position the boat slightly different the next time.