turbo
Staff Sergeant
I can only think that it's due to the Humbrol Dark Green satin which, as we have already seen, also reacted with the pencil marks.
Hmm, that's interesting Terry. I used Humbrol Dark Green 163 on this Halibag several years ago (not sure when production changed factories) and I recall some frosting when I flat coated it but managed to knock it down with buffing.