We have just had a downstairs bathroom refit. This involved replastering the walls. The fitters took the radiator off, and gently stored it away. However its been off the wall for a week, we go on holiday, back in another week, and by the time they come back to finish the job, the radiator will be off for some time. My question is will this start corrosion inside the radiator? Is it worth refitting it or getting a new one?