I too have read other threads about corrosion occurring on metal dust caps and would avoid them if at all possible. Some folk have had a terrible time with them, even with crocodile nose pliers not doing the trick.
Maybe the Vaseline is an option but, to be honest, one can have too many Union Jacks on a car. Sometimes less is more? I love the rear flag, less sure about the side vent flags but I would drop the dust cap covers TBH.
Can I ask about the mood lighting? I am considering this because it's not expensive but I think is unique..... and it gets dark here a lot earlier in the winter in Scotland! But I am unsure about the strip along the glove box. Can it be turned off? Is it intrusive at night when driving? And, this is really cheeky, but would you be really amazing and maybe post some images of the mood lighting in some of your other colour choices! Sad, I know but that's me!
Thank you for taking the time to share with us. That's the beauty of a community like this and I hope to reciprocate later.
Best wishes and enjoy, you clearly are!
Arianne