You should buy a roll of this. You can blast directly into it and then put it into the vac chamber. You don't need to scrap or pour, so there's really no waste and the goop doesn't get agitated in the process. Plus it doesn't stick unless the BHO is really tacky. It get the paddy off easier I slide the film over the edge of a table or whatever and slowly work it off. If it's sticky I fold the paddy over onto itself and press. If there is leftover pieces, just try to pull it up with the paddy or use a chunk and go around "snowballing" it off of the film.