Those interested in the V-2 really ought to take a look at
https://www.v2rocket.com. Among other things, it has answers to all the above questions, plus colour schemes.
"col-pic-2.jpg" and "col-pic-4.jpg" show the standard service
ragged camouflage pattern.
"col-pic-3.jpg" shows two specimens in the
wavy pattern and one in the later
field test pattern. "col-pic-5.jpg" shows another three in field test markings. "meillerw01.jpg" shows another specimen of the wavy pattern.
"v2flight.jpg" shows one of the
black and white patterns - and if it's horizontal, it's either going so fast that it should have been impossible to photograph, or it's probably about to crash.
The website also has a
diagram from Pete Alway's "Rockets of the World", plus a
fact sheet presumably scanned from a type-written document. These will tell you the dimensions of the V-2.
Also highly recommended: Pete Alway's supplemental booklet "In The Shadow of the V-2", which has plans for a load of V-2 derivatives - German, American and Russian.
Has anyone any ideas on how to light 9,000,000 A's?