Hello all, hope everyone is well.

I have just bought a nice 2011 Ford Fiesta Zetec S 1600 for my son so looking for advice from the experts for possible upgrades to do.
Forgive me but I am new to this;
Was thinking of wrapping the door mirrors and roof panel black. I had the same on my old White BMW 4 series and looked nice.
Shall I leave the wheels the graphite grey or change to black. How do I measure to get a size for spacers?
Engine is petrol so I take it no point in a remap? Anything I can do to get a wee bit more bhp?

Thanks in advance for any advice.