I unsuccessfully used a two part glue to "melt" 4"'Zodiac patch and am afraid to rip/peel back patch for fear of doing further damage.   My thought is to put a much larger (6"??) patch, carefully weight measuring with scale (I will use a scale).  Any suggestions where to buy larger Zodiac patches (and application suggestions) would be appreciated.  Yes, I understand copious cleaning, scraping, abrading & wiping with acetone (or other) are needed.  Yes, temp & humidity requirements need to be observed.  Frustrating as I was successful with two other patches.