Hello Gordon
I think that you have made a bold attempt at a very difficult model and I raise a glass to you!
You ask about the extent of your paint work chipping. Like RAGIII indicates, I think this is very much a matter of personal taste and preference. I too am a minimalist, well to be truthful, pretty much an almost nothing at all-ist ! So for me, there is a bit too much, but I wouldn't want to confuse my doubts over the extent with respect for your exploratory technique. My guess would be that unless you had specific photographic image in mind, the ground crew would be touching up a distinctive cowling like this on a reasonably regular basis. That said, be proud of what you have achieved.
This is just my view and worth no more than anybody else's and I really look forward to seeing more of your work.
Best wishes
Nigel