I have an extra rudder to my international 470 that is a bit beaten up. It has obvious repairs (epoxy?) and is painted white. My concern is, given the age of the boat (~30 years) that the paint may be lead, and thus dangerous to sand. Perhaps a subsequent painting was with lead? Also, how dangerous is sanding patches to the rudder, I'm not sure with what material they were done. The masks I have are not for lead paint (they specifically say that on the package). Should I be concerned? Should I be using a respirator?? Thanks!I'm fixing up this rudder just to get some practice before I work on my boat. I am completely new to repairs like this. Thanks!