That build up of creamy gunk around the exit port of the catch can is completely normal. It is caused by condensation in the system when the car is cold because of either the weather or short journeys. When you switch the engine off after a journey if warm enough the condensation will get burnt off. However if cold it mixes with the rest of the PCV gasses and forms the gunk which you have.
I experienced exactly the same during the winter months but now that it is warmer it has disappeared
Oh and the wheels look great!