EUROGRIT ( Coal slag derivatives) and COPPER SLAGs are used for SA2 1/2 and SA3 surface preparation before painting. But it has been experienced certain disadvantages/ problems in getting desired surface finish by the above abrasive. Both the above abrasives are having high breakdown ratios. The concern is tiny black particles are get embedded inside the vallyes of the surface profile which are highly visible in naked eye. This surface impregnation of these breakdown fine black particles will neither give desired surface colour and will also have high level of surface contamination which will be a cause of premature paint failure. Normal air hose blow is unable to remove these embedded particles. But there can be solution to this problem also. We would like to have views from prospective user of this type of abrasives used for blasting and the best management practise for this problem. To mention GARNET abrasive absolutely has no problems like this. Pl. share. regards