Yes, isn't that always the case right when you get rid of something...
If you do it, make sure it's a thick layer. In using OA it still seems to have a "degreasing" effect and breaks down old grease some, but not fully. I assume evaporust is similar. The only other stuff I have used was WD40's version of evaporust. If you left the metal in there for too long it starts turning it black, which scrubs off mostly. So the thicker the better, so it doesn't break it down or penetrate into it.