Ahh thats a point lew, might give it a go at minisport RR once im up and runing, its about 60 quid isnt it ?.
Right today i,ve inspected the front panel and behing the bumper in genral, i,ve found little rust as you might expect from looking at the rest of the car and considering the weather tends not to get behind the front bumper like it can the read due to it being like a weather scoop on the back haha.
Front bumper and endplates off:
Inside the under light cavity (Nearside) :
Inside the under light cavity (Offside):
Crack in the front valence which is caused by the painted sealer they have put on (not fibre glass as i thought it to be):
Looks like this is weld but could just be underseal dripping at the lowest point:
Heres why the radiator had to come partialy out (because the bumper bolt is tucked in there):
As for rust on the inside of the bumper......theres bugger all rust!! Wahoo one less job haha: