You really don't have anything to get bant out of shape over. You posted pics and asked for opinions. People are posting comments that you should really consider.
No one in their right mind is going to buy that as a running engine. At best it is spare parts, or a core for another rebuild. It is a valid point to wonder about other aspects of the engines assembly when looking at all that paint in places it shouldn't be. It is not just apperances, I see paint in several places that can cause lots of trouble.
As pointed out the paint on the valve stems isn't good for the stem seals. Paint on the springs, heads, etc is probably going to flake off and run through the oil of the engine, plugging things up, or gouging the crap out of things. Sensors shouldn't be painted, neither should injectors. Paint on the mating surface of the block will cause trouble with the headgaskets. Paint down the intake manifold, in the spark plug holes isn't good either.
Then there are obvious assembly problems, such as the cam sensor bass-ackwards, the waterpump pulley is just comical, and are you missing a core plug on the driver's side head? Paint in there too. This engine will have paint chips floating through every fluid it has.
Seriously, that needs to be taken completely back apart and reworked before it is used. That's the advice, don't call that an engine. Be thankful all this was pointed out before someon went through the trouble of installing it to try and use it. Chalk this up as a learning experience.