Hello Toshi, I regret that I have not been around the forums much for awhile and haven't been able to follow some of your builds. That's what happens when you remodel your house and in the process move into a new "Man Hangar". Thus, I haven't done any modeling in the past 3 months.
Anyway, I am very very excited to see you build the PBY-5. The Monogram PBY kit is the one kit in my stash that I am most excited to not only build but, do my best work on. I actually have 3 of the PBY-5 kits, 1 PBY-5A and the Pro Modeller PBY-5A. The PBY is one of my favorite all time aircraft and that is because my father flew them. He was a flight instructor stationed at Pensacola NAS during the war. Although he flew pretty much everything the Navy had, he really loved the PBY. I have over the years collected a slew of AM for my PBY and some day when I'm confident in all of my skills I will build it up real nice to honor my father.
You've done some really nice work so far. I'm also glad you pointing out any issues concerning the kit.
One thing I should point out to you is that intermediate blue was not used on early PBY's. In particular, the aircraft you are building. Early PBY's, as well as most early pacific naval aircraft, were painted in blue-gray topside and light gray undersides. Navy blue-gray is similar to intermediate blue but not exactly. Model Master makes a blue-gray paint that is a good match. I just wanted to pass that info on to you in case you were concerned with accuracy in your paint scheme. Of course, it is entirely up to you to how you paint it.
I hope that helps out and I'm fully tuned in to watch you build up this magnificent aircraft.
Cheers, Joe