Rear End Cleanup, Help?

Yup. Who’s really gonna see it anyway,right?
Thats why i didnt get too picky with it. Degrease and paint.
I did that once and wound up with something in my eye I couldn’t get out when I put the brake lines back in under car. Next morning woke up with a paint chip the size of my thumbnail stuck to my cheek. Tears flushed it out in my sleep. Been doing it the hard way or not at all ever since...