I am working on an rv-7 tipup I have the skin clecoed to the fame and on the bottom edges the holes are in both the frame and skin and above them is a row of rivets that the holes are in the skin but not the frame I have about an 1/8 void between skin and frame and every hole is a little different I tried an aluminum shim between skin and frame but the curve is compound and a shim isn't working my though is to put something on the skin and frame that JB weld willnot stick to and then put JB weld on the frame cleco on the skin let it set and then remove the skin and I should have a shim of JB weld that matches the void. I have never tried anything like this and would like to know if anyone else tried something like this?