As can be seen in the photo, wet blasting has removed all traces of corrosion from blasted area, leaving some pitting where corrosion was particularly severe. Wet blasting picks out the detail such as the BMW emblem, and the cylinder numbers along edge of rocker cover. Whilst not a contender for a concours restoration, this part will still look smart in an engine bay once fully blasted and burnished.
Rocker/cam cover from a Toyota "M" engine. Note the level of corrosion on rear part of the cover that hasn't been blasted. The middle third of the cover has been blasted to remove the corrosion, and the front third has been further blasted to a burnished finish. Some customers are happy with the finish in the middle of the cover, whilst others choose to pay a little more to have the fully burnished finish like the front of the cover.