Complex sentence: Based on this finding, restoration works were re-done with traditional materials for plastering--the plaster consists of a partly organic material: a mortar mix of lime, sand and surkhi mixed with jaggery, guggal and methi (cummins) powder.
Split into simpler sentences: Based on this finding, restoration works were redone with traditional materials for plastering. The plaster now used consisted of an organic material of a special mortar mix of lime, sand and surkhi mixed with jaggery, guggal and methi (cummins) powder.