If you don't mind flooding your bathroom and having water dripping off everything in it, that's the entire Instructable... Skip the rest and go clean some records.
If, however, you want to keep peace with your family, read how I made a container to keep the destruction to a minimum. I pieced my container together with odds and ends lying around my shop, so you won't necessarily have the same ingredients as me. Use creativity to make your own container. The most important thing to remember is, you'll want to be able to clean both sides of your record easily.
Step 1: The parts I used include:
2. You don't have to make a label cover, but I'm pretty sure a paper label would lose in a battle with a high pressure water jet. A 4-1/2" diameter wire spool is about the right size. Also, try to pick up an empty Cool-Aid jar. The cover is slightly smaller than the wire spool and is thick enough to hold the record away from the box wall so you can clean both sides.
3. Stuff to put it all together. Here's what I used: Plastic to make the mount, a 90 degree 1/4-20 threaded rod, a plastic endcap, a heavy plastic spacer, closed-cell foam tape, assorted nuts, bolts, washers and epoxy.