I'm replacing my entrance step.<br/>The reason is that it is all rusted out.<br/>I got the new metal step from Foretravel and took the fiberglass cover off the old rusted piece.<br/>I riveted the new one on.<br/>But how do I prevent the water coming in from the rain as I am parked outside sometimes.<br/>I kind of want to do calking but if the water finds its way in it may not be able to get...