You may want to use a different primer . I just used rust reformer on the new metal too because I didn't use the rust reformer before I started to install sheet metal. It'll be okay but ....... and I also used a fibered bondo as some one here suggested . Only out in the middle area because I wanted to use up my original to bond the screen at the edges. I may use the original to finish coat if I don't like the way the way the fibered sands and spreads , Haven't checked it out much yet.
I bonded the screen to the inside of the body panel accesible through the trunk at the top of the screen . Very important to get the screen bonded around the edges before putting much pressure on the screen I'll finish bondo in there after I finish the exterior. I wiped down a piece of thick cardboard with WD40 to stick behind the screen till I got the outside roughed in. It came right out after fiberglass dried and I'll wipe down the bondo in there with some mineral spirits before finish coating that.
I have metal at all edges and this seems pretty stout .
I bonded the screen to the inside of the body panel accesible through the trunk at the top of the screen . Very important to get the screen bonded around the edges before putting much pressure on the screen I'll finish bondo in there after I finish the exterior. I wiped down a piece of thick cardboard with WD40 to stick behind the screen till I got the outside roughed in. It came right out after fiberglass dried and I'll wipe down the bondo in there with some mineral spirits before finish coating that.
I have metal at all edges and this seems pretty stout .















