Thanks to all of you for your comments. As always, they give me the impetus to keep moving forward.
Steve and John: Frankly, I was very surprised just how much of a difference the hair dryer makes. The roundels wrap around the edges of the wings and ailerons and I've always had issues getting them to conform to a 90° angle like that. When I hit them with the heat though, they virtually snapped into place. It was literally that quick.
I spirited away my wife's spare unit John. I'll wager your's has a spare unit too as it's an essential piece of kit for women. Now it is for me too!
Bob: I used 'Wash Brown', the 4th from the left, for my filter. Humbrol enamels work well too. In many instances, fellows will use a lighter shade of colour in their filters, but in this instance, the darker shade worked well for me. The secret is to apply multiple thin coats so they build upon themselves, giving a certain degree of depth to the effect.
Vickers: Bud (Coyotemagic) is the go-to guy here when it comes to pastel rib shading. He does some exquisite work with his. He tells me it's easy but I continue to struggle with it. One of these days I'll get the hang of it though.
Cheers,
Chris