Where the engine and rear suspension cradles bolt in, top of the inner guards to scuttle panel, Door pillars, firewall seam, rear wheel arch lower 1/4's, floor side sill seams inner / outer / boot pans and seams, under the fuel tank, around the door seams / rubbers etc ..
For a start . Windscreen to wiper cowl scuttle corners ..
Take a fridge magnet to check for bog etc .. rear vertical seam edge of front guards , lower 1/4.