[VonBarb.]

imo one of the worst things a skinner can do is to invest a lot of time in one skin and then only publish a marked version which only can used as a single / personal skin because it looks weird if all the planes have for example the nr 23 on them or all got gruppencommandeur markings

+1. I've seen so many great skins that would be perfect as new default if only they came with a 'blank' version. Some of them can be quickly edited to 'erase' the historical markings, but most aren't. I also don't see the point of 'unnumbered' skins which still sport the nationality markings. MAT Manager lets you turn roundels off, but the settings will apply to all aircraft of the same nationality, so you need to go for either a full roundels skinset or the opposite, but not both at the same time.
Sometimes some blanks are also so 'blanked' they become pointless. I'm thinking of Hungarian, Romanian or French skins with painted rudders that come with unpainted rudder blank versions which are unusable for defaults as even MAT Manager won't add the painted rudders.

Sometimes the only way is to get the paintbrushes out and do some copy/paste to get what you need...

Cheers

Nico