Good efford to far ! Getting that NM finish right is very difficult. To achieve a better result you wanna try and enhance the contrast. Perhaps try and do some variation in the panels.
On those early jets the surface was quite bumpy, so you might wanna break up the highlights abit.
I have attached a sample of a NM finish i did on a F-105. Iīm not saying itīs perfect...nor am i saying itīs any good, but maybe it can inspire you (i hope it can). Itīs my last 2d project, (which might explain why i was looking into other application

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