Congratulations! I don't know how anyone could even paint any detail on a 1/144 model of an airplane that size!
I do have the MPM RP-63 special issue version of their 1/48 kit but I have done nothing with it so far.
A friend of mine was trained as a gunner late in WWII and shot at RP-63's. I understand that on occasion the radio exchanges got a bit heated when even the frangible rounds damaged the target airplane.
My friend was told that for the invasion of Japan they would be gunners in B-32's that would be used as gunships, firing at ground targets. The A-bomb made that mission moot and he was trained as a radar operator, on the ground directing fighters on intercepts.