Zamil Steel Buildings India [P] Ltd. Brings Interior Face Finish Coatings. Zamil Steel Buildings India [P] Ltd. Is engaged in the design, manufacture and supply of pre-engineered steel buildings [PEB] following ISO 9001:2000 procedures. The Interior Face Finish Coatings are offered in two types: XRW and XPD. The Interior Face Finish Coatings are off-white plain polyester with a nominal thickness of 7 microns.