I would argue that the benefit to sending it out is not in the additional layers of clear. There is no real need for layer upon layer as pinball machines are not kept outside in direct sunlight and harsh conditions.

The first advantage to me would be in any touch ups to imperfect artwork or coloring. On a new playfield these errors should be very minor and only noticeable under close inspection. The second reason is that color sanding would be included as the final step. If you don't already know that is the process of sanding the clear coat flat and then buffing it back up to a high gloss finish.

I would recommend color sanding and buffing a new CPR playfield only. The flatter the finish the more the art pops. This is what I do. There is more than enough clear from CPR. It will make a nice difference. Remember as soon as it is "perfect" a steel ball rolls on it and it becomes scratched immediately.

Bummer that the topic became about kruzmans work. The OP asked about clearing and then later stated he had a kruzmans pf which then turned a major corner. But, thanks Ron for giving us some insight into your work. Your work is some of the best out there and I applaud it.

As I suspected, many additional steps are taken by Ron besides just adding some clear. All of those steps he takes, will enhance the fit and finish of a playfield and therefore it is reasonable to do it for those so inclined.

No need to debate the differences between CPR or Kruzman because they are not the same processes. We can appreciate both. As always, it is up to the consumer to decide what is of value.