I do have a water/sand attachment here but have never used it so far.

People who have and reported on other large MV lists have nothing but praise but there are some quirks and drawbacks.

The device replaces the lance tip on most commercial pressure washers and we are advised to use the larger petrol/diesel engine powered pressure washers to get the huge flow/pressure rate needed.

Media (sand) pick-up is temperamental as it invariably gets damp but making a 50/50 water/sand mix cures this apparently.

The upside is a total lack of airborne sand going everywhere, the cheapest media ever can be used and thin or alloy panels are not at risk from over-heating and warping owing to media friction. You do not need to buy specialist equipment or services, just hire a big pressure washer. Users report that the strip rate is stunning.

The downside being that you now have wet, clean, bare metal that can rust as you look at it and a specialist water based primer is needed immediately. A local firm here does ship hulls with HP water alone and has a primer that is applied wet that will stand up to salt water for at least 12 months with no further paint. It doubtless has a price to match.

R.