I built a workbench with a four-layer MDF top and did not keep close track of the location of the screws securing each pair of layers together (in addition to the glue), thinking that I could locate them afterwards with a stud finder and ovoid them when drilling holes for bench dogs. I do know that I ensured that screws were placed so that the later ones did not collide with the ones already connecting other layers.
BUT neither the electronic stud finder nor the swiveling-magnet nail finder will locate these screws.
I know that fancy and expensive devices exist that are claimed to be able to find nails in lumber, but is there some simple and cheaper way to do what I need?
Perce