There are several more-or-even-more nasty chemicals that will damage PCBs to various extents. But none of those methods should be undertaken without using eithe

There are several more-or-even-more nasty chemicals that will damage PCBs to various extents. But none of those methods should be undertaken without using either a supplied air full-face mask or a proper fume hood, and all of them leave you with the problem of safely disposing of nasty chemicals at the end. Mechanical destruction is cheaper and safer.