| certainly have the last word if you wish. You are focused on the process and that is certainly your purvey for getting the outcome you want with the finish on your car. You mentioned you did not buy one of these paint thickness measuring tools, yet. For entertainment purposes, I will propose you may or may not need the tool and here's why. If you strongly felt you needed it, you would have bought one by now. The link to your earlier post is from one year ago. Time flies. Furthermore, you seem to already be getting excellent results. I would guess in the top one percent of all people who wash and polish their own cars. More like .01 percent, jaja, that is a compliment. Where I used work we would call this the razor shaving argument. How many blades do you really need at one time in a razor and how sharp does a razor blade have to be before you stop seeing an improvement in your face after your morning shaving ritual? This tool would give you some numbers to work with that you don't have now. Would knowing that information signficantly improve your outcome, not just measured in numbers, but in the final appearance of the car? Take into account the one-time fixed cost of the tool, but more significantly, if you buy the tool, then you are going to want to use it. Now you also have a marginal time investment for each and every time you use the tool, presumably every time you polish a car. As the saying goes, time is money. Another way to say it is, will other critical eyes be able notice an improvement on cars that you polished after using this tool? If one was going to be more scientific about it, you would not tell them about the tool (single blinded). Then, if observers are not saying, "Wow, what did you do on this car? This is clearly better than anything you were doing before!" then you may not need the tool. There could be other applications for this tool that I don't know about that would justify buying it. I was simply giving an example of how a change in process might effect the final outcome. If you want to buy the tool for personal use because you think it would be interesting and fun, no one can argue against that point. If you are looking at the tool from a business perspective, or how it improves outcome, if any, then it becomes a debatable point. Painting and polishing cars is definitely not my forte, but the analysis I am applying is fairly universal to all processes and outcomes. Thanks again for the feedback. Interesting stuff!
 "Straight-line acceleration is probably the first aspect of
automotive performance that any intelligent driver gets bored with."
Peter Gregg "We owe a lot to the dragsters.
They always break something,
figure out a way to beef up the part
and then the benefit trickles
down."
Robo "Not everything that can be counted counts. Not everything that
counts can be counted."
Einstein
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