LJ,
With your clue, I went to the Austraian Google site to look for "molasses tub." As it turns out, it appears that molasses works as a paint and rust stripper. Well, this is a new one to me, and I took my first auto-shop class about 45 years ago.
Here's one post from another site:
I've been playing around with the molasses for a few months now, throw it in and forget about it for a month or so, then wash it off.
Olev, please tell us more.
Richard L.