our 1998 sunbird came with a mooring cover that until now has worked very well. the question is how do we restore it to a good working condition. i believe the sun/rain/wind etc has really worn it out. in other words, it doesn,t keep the rain out anymore.it,s a 17' boat so the cover is large.i love having the whole topside covered from the sun and rain so short of replacing, what can i do?