People usually come to us having already decided laser cleaning is what they want. Sometimes they are right. Often enough they are not, and it is cheaper for everyone if that comes out before the job is booked rather than after.
Here is the honest comparison.
They work in completely different ways
Sandblasting throws abrasive media at a surface at speed. The media hits the coating, knocks it off, and keeps going into whatever is underneath. That is why it is fast, and also why it takes material with it.
Laser cleaning puts light on the surface. The coating absorbs that energy and flashes off as dust into an extractor. Bare metal reflects far more than it absorbs, so once the coating is gone the process effectively stops. Nothing physically touches the part.
Where laser wins
When the shape matters. Blasting rounds edges, thins panels and softens stamped detail. If you need the casting marks, the machined faces or the panel thickness intact, laser is the one that leaves them alone.
When you cannot have grit everywhere. Blast media gets into seams, box sections and bearings, and you will be finding it for a year. On assembled machinery, on a boat, or anywhere near a moving part, that matters more than speed does.
When there is nowhere to contain it. Blasting needs containment and cleanup. Laser work produces dust that goes into an extractor, which makes on-site work practical in places where setting up a blast operation would not be.
When thin metal would warp. Blasting a thin panel puts stress into it. Laser does not.
When you want to stop partway. Laser is selective. You can take a topcoat off and leave sound primer underneath. Blasting takes everything down to bare metal whether you wanted that or not.
Where blasting wins
Large flat areas under heavy coatings. This is the big one. On a whole deck, a tank exterior, or a long run of structural steel with several layers of old paint, blasting is faster and cheaper by a wide margin. A 300W laser is precise, not fast.
When you need a surface profile. Some coatings specify a blast profile for adhesion. Laser cleaning produces a clean surface, not a profiled one. If your coating spec calls for an anchor pattern, blasting is what the spec means.
Heavy scale over a large area. Thick mill scale across a big surface is slow going with a laser. Bulk removal is what abrasive is for.
The honest summary
Laser is a precision tool. It is the right answer when what is underneath matters more than how fast you get there, and when grit, water or chemicals would cause a problem of their own.
Blasting is a bulk tool. It is the right answer when there is a lot of area to cover, the substrate is robust, and containment is not an issue.
Most jobs fall clearly on one side or the other. A rusted trailer frame with brackets and box section is laser work. Stripping a barn roof is not.
How to find out which yours is
Send a photo of the piece and a rough size. We will tell you which way we would go with it, and if the answer is blasting we will say that rather than take the work and disappoint you.
Call or text (506) 588-6216 or use the quote form.