Hi Louidee, Im waiting on my kit to arrive, got the same one as yours. Bummer on the pen mark you may be able to lift it using metho, but possibly leave an indentation form the point of the pen, maybe some grain filler might be able to hide it. This will be my first kit, I have high expectations in the build with a few upgrades. I'm a carpenter by trade, if you need to make any further markings my suggestion would be to use some painters tape over the body and mark it up before doing anything else. Good luck with it.