Autor is highly amused with the use of "ain't" in this song, and so structures a verse around it.
"Oh, you'll never get to Heaven with powder and paint, 'Cause it makes you look like what you ain't.
Oh, you'll never get to Heaven with powder and paint, 'cause it makes you look like what you ain't.
I ain't gonna grieve my Lord no more, I ain't gonna grieve, I ain't gonna worry, I ain't gonna leave my Lord in a hurry, I ain't gonna grieve my Lord no more."
Re: Campfire's burning - insert your own verse
"Oh, you'll never get to Heaven
with powder and paint,
'Cause it makes you look
like what you ain't.
Oh, you'll never get to Heaven with powder and paint, 'cause it makes you look like what you ain't.
I ain't gonna grieve my Lord no more,
I ain't gonna grieve,
I ain't gonna worry,
I ain't gonna leave my Lord in a hurry,
I ain't gonna grieve my Lord no more."