[Snowman]

Ouch! Chip that filler off and it would be ok. But it would probably take as much time as it would take to work the fenders on your other shell that already has the perfectly formed top to the hood. Not a criticism in any way of your brother's efforts - my build has had filler like that applied and removed several times over! Learning as I build. Means it takes twice as long!!
p.s. I spy a unibilt pete taking shape in the background, nice! Your workbench is a regular assembly line!!