I bought some African Black Soap from SC and it has some lil stick or shell looking pieces in it and I'm concerned that they may scratch people's skin up. Would it mess the soap up if I ground it up, melted it, and strained it to try to get that out or should I just try to squish it up and feel through it? Also, what percent of the ABS would you use per pound oils if you added it to a soap batch? Never used this before.