A bit dry and tough but does the job
I have an ancient Underwood Standard No. 5 that has been sitting in storage for over 30 years.  Took it out, cleaned it up and it worked great.  But the imprints were a bit blurry from years of use.  Bought this product, worked it with my hands and applied it to the key faces.  Gunk came right off.  Key imprint is now much better, more clear, less blurry.  Roller is old so not perfect but pretty darn good.<br /><br />Pro's:  its cheap, it works, its available!<br /><br />Con's:  it was a bit dry and tough and no way it will now fit back in its cute plastic container, but it works.  Parked mine in a sandwich baggie, tossed the container and instruction sheet.
Rating: 4 stars