Oh look at your precious baby! So adorable!
Pin feathers are where new feathers are coming through- so he is either moulting or still having some feathers come through. Perfectly normal. They might be a bit itchy at times so the extra bathing and misting will definitely help.
Hi! 6 months of age is about the age when they go through their first molt. It sounds like you're doing everything well! Misting and bathing will definitely help.
You little one is super cute!