I removed the air conditioner shroud repaired the cracks using MEK and melted floppy disks and some fiberglass mesh. then sanded and painted with fusion paint.

 This is the wire mesh that covers the AC fan it is rusted to pieces so I will need to replace it.

 here is the shroud back in place and looking good

 I also go the battery box back together.

 while the shroud was off I pressure washed the AC unite and PORed all the rusty bits.

 Ceremonial burning of the old rotten floor.... good by wood rot may we never see you again.