I've always had sports and sporting cars I have a Triumph TR7 and a Jaguar SIII Sovereign, Ive had various Alfas and Fiats, muscle cars etc.
My family raced MGs and a Lotus, as well as muscle cars.
We don't have the rust issues, heat and sunlight are more of a problem here, plastics a rubber bits are probably more likely to deteriorate in our warmer climate combined with UV exposure, our sale values are higher and so are parts prices.
Our climate is probably more suited to open top motoring, however our summers are a bit to much at times so roof up and air-cond on, is often the order of the day!
ATM the weather here is a bit on the cool side, with snow on the higher ground. Roof up heater on!
"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"