Hi David guys, I'm new here at this Forum.
I appreciated a lot your work and I am doing some research as I intend to build the very same plane.
I live in Rio de Janeiro, Brazil, and the last example of the FW-58 is in a museum not very far from here. I have seen it quite a few times. An old carpenter (now deceased) from my local Yacht Club actually worked on their construction in the 40s, and told me a lot of stories about the "Fábrica do Galeão" and these "big birds" as he recalled them.
That´s just one remark to your build, and I feel that it can make things a bit more accurate and actually easier for you: the FW-58 is actually painted in a flat, dull silver. The paint they use here is locally called "Alumilack", and it dulls pretty fast when exposed to the elements. BTW, the plane is almost entirely covered with fabric - it won´t shine as NMF at all. And the metal parts are painted with the same stuff as well.
So you don't need to make her shiny as you intended with the metallizers. Believe me, a dull silver like Humbrol 56, Tamyia XF-16 or Revell 36199 will do the trick very well. And all of these paints are much easier to handle, mask, etc.
HTH
Eduardo
Rio de Janeiro, Brazil