I agree with HOTRODPAINT. Take it off definetely. If not then the new paint will have rust runs in it for sure later on. Also don't paint in 65 degree weather. Wait until it gets 10 degree's hotter or so. I mean you can paint in that weather but I wouldn't do it. Make sure you have sealed fans and lights or they will pop or cause an explosion. I haven't had a problem with non sealed lights but now have seen some bad things and hard about them and will only use a spray booth.