BMW barrel, corroded and ingrained with burnt oil and road grime.

The finish was achieved by degreasing and pressure washing followed by masking the gasket surfaces and blocking the bores at either end. Low pressure fine glass grit removed all the corrosion, road filth and burnt oil. The burnished finish was imparted by wet blasting at low pressure with 200-300 micron glass bead followed by blowing with compressed air and pressure washing to remove any residue.

BMW head, corroded and ingrained with burnt oil and road grime.

This complex casting had deep fins which made it very difficult to clean. The finish was achieved by degreasing and pressure washing followed by masking the gasket surfaces with duct tape and blocking the blind M6 holes. It then took several blasts with medium crushed glass at varying pressures to knock off the burnt oil and carbon, followed by honing the surfaces with fine crushed glass. The burnished finish was imparted by wet blasting at low pressure with 200-300 micron glass bead followed pressure washing to remove any residue.

BMW gearbox, heavy surface corrosion and road grime.

The major part of this job was preparation. The spigot shaft bearing was removed and the case was degreased and pressure washed. The oil filler, level and drain ports were blocked with suitable threads, the gearbox packed with rag and the gasket surfaces protected by a sheet of gasket material cut roughly to shape and sandwiched between the cover and the gearbox and the spigot shaft bearing hole blocked. Several blasts with fine crushed glass at different pressures removed the corrosion and pitting on the underside and this was followed by blasting at low pressure with 200-300 micron glass bead to impart the burnish. It was then blown out with compressed air, pressure washed and dried.

BMW stainless exhaust, heavily tarnished and corroded.

Note the blocked exhaust ends and the plugged lamda sensor threads. The satin finish was achieved in with a three stage processs: first by blasting at relatively low pressure with medium crushed glass to remove corrosion and tarnish, then by blasting at high pressure with fine crushed glass to penetrate and clean out the pits and finally by wet blasting with 200-300 micron glass bead to impart the satin finish.