Quoted from dung:

Depends where it is? I had one in my machine that I took a very small drill bit and drilled holes around it through the playfield. I made sure to stay within the indention of the post so that when I was done it would be covered. After drilling some of the screw off and giving it some wiggle room I used a small punch insert through the underside of the playfield to knock out the piece. Then used wood filler. You would have no idea it is there unless you removed the new post.