Just to provide some solace...I'm have some real struggles with finishing a project "as we speak", too...so many "moving parts" and while I'm inching closer, I'm not were I need to be to get the glass-smooth surface I'm aiming at. Perhaps it's just because I'm using a different product than previously. Some of it was not paying attention to the teeny-tiny type on the gun components and getting a mis-matched setup for the first few coats. At least it's going to be a darn thick finish that will be pretty durable for the purpose. LOL
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The most expensive tool is the one you buy "cheaply" and often...