Got myself a nice little WM-25 on ebay for £10. Outwardly it's in great condition but needs a little TLC.

1/ The volume potentiometer is incredibly scratchy, I hope I can clean it.

2/ There is resistance and a harsh click when opening the cassette door which I'm certain will result in a failure if left this way.

3/ The previous owner stuck a velcro strip to the back and the glue is going to be a bit of a challenge to clean off without scratching.

4/ Lot's of deposits on capstan and pinch roller. The head looks clean though.

Now all I need is some spare time 

Here it is all cleaned up. The clicking door mechanism is bothering me though, it sounds very rough and doesn't line up properly when closed.

1. A little deoxit and she'll be singing again.

2. Might have been dropped at some point...don't force it! Get pro help here..
3. The glue residue can be removed with generic adhesive removers that ar plastic safe..test on an inconspicuous location first!!  See this product http://googone.com/GG-Browse-Products/Goo-Gone-3oz

4. clean the capstan really well and the pinch rollers with rubber restorer.

The door will probably need to be re-aligned if it can be Is the hinge in good condition?

Thanks. The hinge seems to be catching inside the unit on the left side, just behind the S in STEREO. I've stopped using the Walkman now for fear of serious damage. I might open it up over the coming weekend and have a look.