So... I tried a can of Tamiya spray paint as a clear coat.
Turned out to be a bit of a bummer. Think I sprayed on to much
The paint started to bubble a bit, the clear paint had tiny bubbles and started to turn yellow. I used a black marker to touch up the black windows and for a masking line or two... not a good idea as it turned out.
I just finished cleaning the shell and I'm repainting
When I'm finished I'll retry the spray paint, when that's finished I redo the masking lines.