I am at the point of doing some body filler work on my old Chevy. I have some holes in the trunk lid and fenders from trim and emblems that need to be filled. I do not want to weld them permanently in the event I want to use the emblems and trim sometime down the road. I had planned on filling with filler for this paint job but I need a way to backup the filler and keep moisture from getting to the filler. I have some metal adhesive and I was thinking of plugging the holes with a piece of metal and the adhesive. Then go ahead and smooth with filler. Yea or nay. Any other better ideas out there? On the last paint job, the holes were covered with a type of tape and then filler over top. That work must be about 15 years old now. Thanks in advance for any ideas.