I just leave the car uncovered until the car dries up then put the cover on after a wipe down to remove grit, in other words treat it like any other car. Condensation can be a problem so with hood up I leave the sidescreens open under the cover and give the car a run as often as possible. Been outside for ten years , John Taylor cover in summer, over a tonneau cover and a heavy duty cover in winter mostly with hood up. Water in the plug wells needs to be avoided when uncovered depending what engine you have, lots of info on here.
regards John k
