Did you know that if you have a repair done and it cracked whilst being done ,(which sometimes happens) you can insist they replace it free of charge?? especially if they do not point out the risk's of it cracking ! after all you asked for a repair not to have it made worse .
also be aware they are not magicians and it probably will not dissapear , strong yes but invisible not in the majority of cases ,
on the whole the company's doing this are charging your insurance company between �40 and �75 + vat so make sure you are happy with it !!! money for old rope as they say !!