I had an extra NES sitting around that was in rough shape, so I decided to give it the full treatment.
It got a complete teardown and restoration, fresh capacitors, an NESRGB mod, a NintenDrawer installation, a brand new replacement shell with fresh stickers, and plenty of cleaning along the way.
It took some time, but seeing it come back to life made the whole project worth it. Definitely one of the most satisfying restorations I've done.