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And waiting 50 minutes between coats of clear? Really? I guess that's how it's done by professional painters on North Pole

That kind of advice can ruin months of someone's hard work. Because there are hundreds of clearcoats on the market with many options of reducers and hardeners for various temperatures and speeds.Many of them will react different to fresh coat after 20,30,40,50 or more minutes.So,unless you know which specific clear,reducer and hardener OP is using, I would keep that advice to yourself .

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Once I shoot a clear coat I thin the remaining
amount and start shooting again... the voc need to
float up through... pretty hard when its dry

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Is that what you got from data sheet ? This may have worked with cheap lacquer ,but it's a bad idea for urethane products. Reducing clearcoat will cause dieback, making it dull,easy to scratch,chip and will lead to premature deterioration.Even if you try buffing,it will not have the gloss and luster of properly mixed and applied urethane clearcoat. Just wondering, what kind of warranty your paint jobs come with?