1 ) When you know more information about the clay bar grade, and colors. You also should be to know more information about the certificate of clay bars.
2) Base Certificate of Clay Bar: MSDS, IDCRT( Identification and Classification Report for Transport) by authority lab. And ISO9001,BSCI, Factory Audit is plush of the company.
3) MSDS is better for you know the clay bar meet to Europe or USA standard or not. So the report need by authority lab.
4) And DCRT( Identification and Classification Report for Transport) is good for your shipping process. And the test report also need by authority lab.
5) ISO and BSCI certificate is better for your product to sell in locate supermarket and gas station, stores. Also better for sell online plat form. Like Amazon, walmart etc......