Painted mask for Scania & Just all AI trucks

[SophusNordfelder]

Is your feature request related to a problem? Please describe.
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Yes its related to the problem when i make a skin for AI Trucks that kinda depends on the parts thats not Painted e.g. Olano Logistique

Describe the solution you'd like
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The soloution i would like to see is that all the parts that are plastic that can be painted is painted ( Painted Mask )

Describe alternatives you've considered
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I really haven't considered any alternatives as the skins looks kinda weird when they dont use painted mask

Additional context
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