Rear End Cleanup, Help?

Great job! Rustoleum on top of extend rust proofer gives a similar finish, and the more elbow grease and determination, the better. The blue $30 plus angle grinders from harbor freight are adequate, just take your time and don’t crowd the machine. If it heats up and trips, go ahead and clean and prime what you’ve done during the cool-off, plan on using the better part of a day. The cleaner it is before priming, the longer it will last.