I know there have been hundreds of threads on here about this product. I have looked through most of them and I haven't seen if anyone has put it over herculiner. I just ordered MMA mats and HT for my boat. I'm getting the DAP contact cement to put it down. I was wondering if I need to scrape all the hurculiner off before I install the mats or will the contact cement adhere to it. Any information would greatly be appreciated.