I don't think it was foolish not to accept the P.24. In 1940, 300 P.50 was supposed to see service (after appearance the problems with engine, 300 were cut to only 30).
Of course You could say, that the war was coming, but till May 1939 no one expected it will start in Sept. Unfortunately, it was too late to re-equip with P.24...
And about in 1940-42 Poland was supposed to have a modern air force with all brand new fighters like P.50 (prototype), P.62 (project), P.48 Lampart (project of heavy double engined fighter), bombers like Los (seen service in Sept.), Mis (project), Sum (prototype), recon like LWS-3 (prototypes), LWS-7 (project) or floatplanes like RWD-22 (project).
And the name for Polish Air Force is Polskie Sily Powietrzne.