That skin image you posted looks like the "damaged" airplane skin.
The normal skins go into Paintschemes > Skins folder, as we all know,
but the DEFAULT skins for
any airplane is often placed inside a folder named Summer inside where all the
files for that aircraft are stored. Sometimes its another folder with a WINTER or DESERT name on it.
Inside that summer folder you will see 4 skin files...
skin1o.
skin1o.tgb
skin1p.
skin1q.
ALL of these skins are SAVED as TGA files, but one of them is named "tgb". as I have written.
When you save your files into that folder in this manner I showed you, that airplane will
always have that type pf default skin in your game.
Do not forget the sizes of each file, or it might not work properly...
skin1o. (size 512x512)
skin1o.tgb (size 1024x1024)
skin1p. (size 128x128)
skin1q. (size 64x64) some people save them at (size 32x32) but that is to small.
If you want to paint better damaged skins for this particular airplane, then look
into the folder of the original mod airplane and start to open the files with a TARGA (tga) type.
Those TARGA files are usually the skins for the airplane. Look at them, paint them and do not
forget to also paint the ALPHA Layers for transparency and save them in the same exact size.
Then there is also a cockpit folder where all the cockpit part-skins go into , but sometimes, some of
them are also inside the main folder where the airplane-mod is stored at.
So, Open all the TARGA files you can see and look at them. That is the ONLY way, you can figure
out how the airplane is made of according to the skin it uses.