Hi guys, I sprayed a 30m panel over an existing s+c scratch, floated it up lovely, only to find it had cracked all over! The rep said I should have never gone over s+c! He also said if I'd rendaid the scratch, he wouldn't guarantee that either! Although I do know someone who has rendagriped an old scratch and gone over it with no problems! Instead of using the customers house as an experiment, & losing more material, I'm considering doing the top coat in s+c! But I'm hoping someone on the forum may have encountered this before & has a solution!? Cheers Rhys.