I think we all might be confused by what you mean scratches. Do you mean literal scratches or are you describing poor curd fusion? If you mean the latter, then you'll probably need to press longer and/or increase weight. Please tell us your pressing time and actual PSI. A picture wouldn't hurt either. Somewhere on the forum must be a pressing description or two or 3. Note the differences, and if a picture is provided, see if the results are what you're after.