Some more rust repairs.

 Before cutting the "car" I want to have "healthy" metal where the cut is made. Right side quarter panel is in bad shape. Tape shows where the cut is planned.

Shaping of this piece is mainly done by hand.
   

To check the shape I'm comparing repair piece to my car. Reshaping and comparing until I'm happy with the result.

Masking tape on backside of repair piece to not scratch the paint. 

Welding preparations.

I use a technique where I tack weld the repair piece on top of the damaged piece, this is just to hold it in place for now.   

Then I cut along the top side of the repair piece and and push in so that the repair piece and car sheet metal are flush and tack weld in place. 

When one have cut around all sides of the repair piece the replaced piece should hopefully be possible to take out as demonstrated in the video. 

After some more welding and grinding this is how it looks. There are still some holes in the welding joint that will require some more welding and grinding.