Hi All, Before I retired I patched up to 4 inch dia holes all the time. The material I used was called "Bondo" Regards, Bill KB7YUM -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm