Many layers of car filler and lots of sanding to get the shape back into the front of the bonnet. It's looking much better than before.

Applied car filler to the front of the bonnet.

Sanded smooth

Stop putty to fill in the gaps between previous layers of paint.

Looks like it's been resprayed a few times.

More sanding reveals more rust...dammit!

Bought a HVLP (High Volume Low Pressure) spray gun off ebay $43.90

Spent about $80 at Supercheap on mostly sandpaper.