Is there any kind of plastic sheet covering that I would be able stick/glue on to the sides of my arcade and then trim the excess that would help it to look better? 
Yes, I do know that I should probably start over with the sides...strip, sand, prime, paint and start over.  However, I spent almost all the energy I had on this machine a couple years ago.  Basically, I am looking for a quick fix.
Any ideas would be greatly appreciated.