I'm working on a project to add some custom lettering to a Bachmann pullman car and I used 91% Isopropyl alcohol to remove some custom graphics on the sides of the car. That worked great but somehow during the process some of the alcohol got on the roof and left white streaks. Does anyone have any tips or tricks on how I can remove the streaks? If not, can I repaint the roof with black spray paint without it looking terrible? Any tips for that would be appreciated as well!