1924-S Standing Liberty Quarter. You Vs PCGS

Beautiful coin. So how do you distinguish die polishing lines from scratches caused by cleaning? Thanks

@BGLI, it's sometimes difficult to discern die polishing scratches from post mint/cleaning scratches from pics, but in hand it's obvious.

Die polishing scratches will be raised on the coin. Because the scratches are incuse on the die itself, they become raised once the coin in struck. Cleaning scratches are obviously incuse on the coin.

Die polishing also will not typically pass over devices. Because the fields of the die are polished, the lower portion of the devices are unaffected. You'll notice on the OP's coin that the scratches come right up to the devices, are not visible on the devices, and are then visible on the other side of said devices. Occasionally you will see minimal die polished on low relief, large surface area devices, but are primarily isolated to the fields. Cleaning scratches will pass over fields and devices.

Edit: Coinfrog beat me too it! Too busy typing.