Topic 5 by Mohammad Shahriar Hossain ( Shahriar Nabid ) - Thursday, 8 April 2021, 5:15 PM Number of replies: 0 Assalamu Alaikum Sir,I have learnt about Sand Blasting, PP-Spray, Wrinkle, Nano Finish.I want to learn more about P.P. sponging.I have understand properly this lecture so I have no question for this lecture.Thank you sir Permalink