In regard to covering a model with so much internal detail, some museum models cover the top surface of wings, empenage and 3/4 of the fuselage,
leaving the interior readily viewable from some angles and giving the appearance of a covered model from other angles. This would take considerable finesse with the cloth.
There is a company which builds models of astounting detail which uses this method, although their completed 1/15 scale models range in price from $4K-$13K !!
View at:
http://www.fineartmodels.com/pages/p...roduct_area=90
They may have a source of reference materials, although I have not yet tried to contact them.
Also, their model shows the webbing woven between the wing ribs near the leading edge as well as near the trailing edge.
Here is an old photo (poor quality) of an original Dr.1 before being covered:
http://www.fokkerdr1.com/Dr1_144-17.jpg