Quoted from Morgoth88:
So how would you attack this? Hasn't been touched in at least 10 years. Not sure if it is just dirt or wear or both. Naptha wipe and then just blitz over it?
I had a machine that looked like that. A very clear delineation in the clear coat from the ball play area vs. the untouched area. That foggy clear coat is years of microscratches from imperfect balls. And yes, there is probably a good layer of filth on top of that. My recommendation for a good “shop” without tearing down the entire playfield:
1. Buy a good set of cleaning and buffing pads for a cordless drill, such as these:
amazon.com link »
2. Buy the complete set of Novus 1, 2, and 3. Also buy a canister of Blitz.
(Optional - buy a new set of rubbers)
3. Remove any components that are relatively easy to remove and don’t involve a complicated and time consuming process. Things like ramps rubbers and plastics. This will expose most of the playfield area and allow easy access to clean all of the heavy wear areas.
4. Start with Novus 3 using a sponge buffing pad. Work it a little at a time to see what kind of progress you are making. This will give you a guide on how much time you need to work the product to get the results you are seeking. Once you work the whole playfield with Novus 3, repeat with Novus 2, then finish with Novus 1. If you have any questions or concerns, call the number on the back of the Novus bottles. I did, and the tech support was great. The guy was highly knowledgeable about the products and was very familiar with pinball enthusiasts using their products.
5. Use the cloth buffing pads and wax with Blitz. Hand wipe the playfield with soft cotton. I recommend repeating this process - double wax, to protect your hard work and playfield.
6. Since you already have a lot of the playfield taken apart, use the opportunity to clean all of the components you removed, like the ramps and plastics. If you ordered the optional rubbers above, reinstall those with the cleaned up components.
7. Buy new balls from Ball Baron.
Good luck! It’s a little bit of work, but you will be pleased with the results!