Can't remeber anything in the literature from Dasiy (and they'd have the definative answer).
Do know the 717 - 747 -777 (and I guess there are some 727's out there still firing) are very easy to detail strip; doubt any air pistol is easier to get seals in hand. IF it were to damage any of the parts, them some time down the line you'd need to spend a few (very few) bucks and reseal it.