I'd rather not make mistakes at all but I'm getting better at fixing them, and am making fewer of them.
I'm way too slow to be in the same league as a production type of professional, but can do some casual/no hurry side restoration kind of piecework since...well, that's what it already is.
In hindsight, given the amount of dirt and insects, several coats of clear was definitely a good idea. Production style 2-coat clear is great when you can keep everything perfectly clean but because I lack that capability, there's no other way to compensate that I know of.