It is simple to pop rivet aluminum or fibreglass to plywood using a washer on the back side. Similarly if you are popping something to thinner spruce , use a back up washer. My couling has a framework of 5/8" spruce. The piano hinges are popped to it without back up washers. Every pop rivet is first washed in acetone before epoxy is applied to it before popping. The holes in the wood are covered with epoxy before the popping takes place. If popping occurs near the end of the wood and parallel to the anular growth rings, there is danger of the wood splitting as the rivet is popped. Use a larger drill hole in the wood and back the rivet up with a washer .Or use a long (1") rivet , remove the cental mandrill from it, add the epoxy, push it into place and fill the inside with epoxy.It will never come out, the piano hinge will be destroyed first. Harold Woods Orillia,ON.Can haroldwo...@rogers.com
