All rough welds, burrs and sharp surface shall be ground smoothly and all weld spatter shall be removed prior to blasting operations.
The compressed air used for surface preparation shall be of sufficient capacity to prepare the surface to the degree specified and shall be free of oil and water. Contractor shall ensure that the specified surface cleanliness and profile are being achieved.
All surfaces must be blown down with clean dry air, brushed or vacuumed free of dust before primer application.
After sand blasting operation is accepted, the painting operation shall be immediately followed such that there is no deterioration or rusting on the surface.