I use slip joint or water pump pliers with a cotton cloth (old grundys will do) to stop the pliers biting the aluminium. Managed to get them off an back on with no significant marks. They won't be very tight so you don't have to use much pressure.
@nobacklash started
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I use slip joint or water pump pliers with a cotton cloth (old grundys will do) to stop the pliers biting the aluminium. Managed to get them off an back on with no significant marks. They won't be very tight so you don't have to use much pressure.