Hello,I am building the 1/48 Hasegawa F-14A Tomcat. I am getting ready to close up the cockpit (Its being built gear-up in flight) and noticed that the canopy has a raised line running lengthwise down the center of the canopy. My question is, is this line due to the molding process, or should it be sanded off? If I need to sand this off, what grit sandpaper should I use so that the canopy is useable? Thanks in advance!