Buy yourself a toffee wheel of Amazon or eBay and fit it to a corded or cordless drill(my cordless drill isn’t fast enough so I use a corded drill).Makes light work of that job,also good for removing graphics,stickers and badge residue(3M double sided tape)from panels and glass,just keeps it moving on panels as not to burn the paint.
Been doing it this way for years and always works,without issue.