De-icing
OK, so say you get de-iced to remove snow from the aeroplane - assuming they use a mixture of hot water and type 2 fluid and they don't apply a second anti ice coat.
If it then begins to snow as you're on your way to the holding point, am I right in thinking that if you've just been de-iced, you only have minimal protection against further contamination and therefore don't really have any holdover times to rely on???