Unfortunately, my early 60's Gretsch 4157 starts wrap cracks. Other than 2 spiders on the wrap, the snare condition is really nice. So, I loved this. These spiders ruin its beauty knock me out... I tried a glue and nail polish to prevent further cracks. So, I have two questions. #1 Glue/nail polish is enough for the further cracks??? Moreover, are there any good products? I just used a common product. #2 If possible, I'd like to do inconspicuous these spiders. Any good ideas??? Any suggestion is appreciated!