oK,---We are singing off the sheet of music. Go to the auto store & buy a spray can of PB Blaster, a super penetrator for gummy deposits. That body section is at close tolerance fit.Give it a good drowning from outside & inside & let the chemical do it's job for about 1/2 hour. Now start working it in & out, spray it again. It will come out,but may take some time. Ray