A-riveting we will go....

Since spot welding the new flanges onto the wheelwells ended up a bust, I went to Plan B:  Pop-riveting.  The only drawback here is the need to drill reliefs for the mandril end of the rivets wherever the tail end of the rivet will be flush with the wood frame or walls.  Oh well, let's see what happens here....

Starting with the curbside fender on the inside edge

Clamping so the holes all line up to minimize any puckering along the edge

Same wheelwell, different view

Looks like I'm on the right track!

A couple of beads of flashing sealant and nine rivets later

Leading and trailing edges complete

A tire's-eye view

Lather-rinse-repeat

The outer side - this will be cut to match the relief in the wall later

Reversed for comparison - showing the soon-to-be trimmed relief

It's time to load these up along with the floor register and take them over to Roger's place for a fresh coat of paint.  Soon it will be time to install the wheelwells into the floor followed by some waterproofing action!