WHy all the hate for WD40? It's just a tool as much as grease, oil, allen keys or any other tool or material used for working on bicycles. When used in the correct way it's highly effective.

If the chain was rusty and had some sticky links WD40 would be a lovely way to loosen them up and work out the rust residue. Granted it would need some reapplications and padding off the crud washed out with a paper towel but if the chain needed this I'd have do issues with riding a few miles with it in place and then add oil to the chain. No need to "wash" it out with anything.

Anyhow I've got this image from the OP of someone trying to "toothpaste tube" pressurize WLG into the bearings and the excess oozing itself all over the place....