I just use gaffers tape. I found it years ago doing live stage productions and always keep it on hand now. It is great stuff and you will find many uses. I don't even buy duct tape anymore.
It does not dry up and rot away like duct tape. It does not leave the adhesive behind. It is great for labeling and writing on. Holds up well against weather.
After paint cures I tape the entire inside of the body and have had great results and even have people asking... Hey do you have some of that tape
I buy it locally at music/stage supply store.
here is a link so you can see what it is.
http://www.goodbuyguys.com/catalog/i...59519c62b5b7ab