I'm cleaning out the port side settee locker to relocate my batteries and I'm stuck with removing the old paint. It's not adhered well enough to bond the battery tray framing or paint over, but it's also not coming off easy with sand paper. The low spots in the fiberglass roving are the most difficult spots to deal with. Does anyone have recommendations on what to use? I have the typical grinders, random orbital sanders, oscillating tool, etc. Looking for a good pad, wheel, etc to get the job done.