Every paint shop cleans spray guns. The question is whether it happens in an open bucket of dirty thinner or in a machine built for the job. Bucket cleaning wastes solvent, puts your painters’ hands and lungs in the fumes, and still leaves guns half-clean — which shows up later as spitting, orange peel, and color contamination on a job you can’t afford to redo.
A spray gun washer — also called a paint gun cleaning machine or gun cleaner — fixes all three problems. This guide walks through the two decisions that actually matter (solvent or water-based, manual or automatic), how to size a machine to your shop, and the part most buyers miss: what happens to the dirty solvent afterward. Browse the full spray gun washer lineup, or keep reading.
What a spray gun washer actually does
A gun washer is a sealed cabinet that circulates cleaning solvent through the gun’s own fluid passages under pressure, then flushes the exterior. That’s the important distinction from a bucket: the solvent goes through the gun the way paint does, so the needle, nozzle, air cap, and fluid tip all get cleaned instead of just the cup and the outside.
Because the cabinet is enclosed, solvent vapor stays inside instead of in the breathing zone, and the same charge of solvent gets reused across many cleaning cycles rather than being poured out after one gun. Most shops are surprised how much of their solvent spend was evaporation and dump-outs rather than actual cleaning.
Decision one: solvent or water-based?
This follows your paint, not your preference. Clean the coating with the chemistry it’s built on.
Solvent gun washers
If you’re spraying solvent-borne coatings — 2K urethanes, epoxies, lacquers, most industrial enamels — you need a solvent spray gun washer. These run on lacquer thinner, gun wash, or recycled solvent, and they’re the workhorse in automotive refinish and general industrial finishing.
Water-based gun washers
Waterborne basecoats don’t clean well with solvent, and solvent-cleaned guns can contaminate the next waterborne job. A water-based spray gun washer uses a water-based cleaning solution instead. If you’re new to it, we answer the mechanics in how water-based spray gun washers work.
Shops running both
Plenty of shops spray waterborne base over solvent clear. If that’s you, don’t try to make one machine do both jobs — cross-contamination is exactly the failure you’re trying to avoid. Run two dedicated stations, or step up to a hybrid unit built to keep the two circuits separate.
Decision two: manual or automatic?
Manual units give the operator a brush and a flow of solvent inside the enclosure — the painter does the work, the cabinet contains it. They cost less, take up less room, and are genuinely the right answer for a shop cleaning a couple of guns a day.
Automatic units close the lid and run a wash cycle unattended, typically two to four minutes, so the painter walks away and does something else. That’s where the math flips: once you’re cleaning several guns a day, the labor you recover pays the difference faster than most owners expect. We go deeper on this in manual vs. automatic spray gun washers.
The honest rule of thumb: under about three guns a day, buy manual. Over about six, buy automatic. In between, buy automatic if your painter’s time is billable.
The solvent lineup
Our solvent machines run from a single wall-mounted manual station up to twin dual-station production units.
- Kresco GW300M — manual solvent gun washer. The baseline machine for a one- or two-booth shop.
- Kresco GWM100 TWIN — wall-mounted manual, two stations, when floor space is the constraint.
- Kresco GWA200 — wall-mounted automatic. Closed-lid cycle without giving up floor area.
- Kresco GW500A — manual and automatic in one cabinet, so a quick touch-up and a full cycle share a machine.
- Kresco GMWA600 TWIN — dual-station for shops where two painters clean at once.
- Kresco GMWA700 PureTech Hybrid — hybrid unit for shops running both solvent and waterborne work.
- S50M — manual solvent gun cleaner.
- S10A and S20A — automatic solvent gun cleaners for higher gun counts.
The water-based lineup
- E50M — compact manual water-based cleaner.
- E100M — manual water-based with more capacity.
- E300A — combined manual and automatic water-based cleaning in one cabinet.
- E800A — deluxe manual/automatic workstation for high-volume waterborne shops.
Not sure which side of the fence you’re on? What is a solvent-based spray gun washer? covers the basics.
The part most shops miss: recycling the gunwash
Here’s where a gun washer stops being an expense and starts being an investment. A gun washer reuses its solvent charge for a while, but eventually that solvent loads up with pigment and resin and has to come out. At that point most shops pay twice — once for fresh solvent coming in, again for hazardous waste going out.
A solvent recycler breaks that cycle. It distills the dirty gunwash, gives you back the large majority of it as clean usable solvent, and leaves the pigment and solids behind as a small amount of dry waste. Your solvent purchases drop, your hazardous waste volume drops, and your manifest gets shorter.
Pairing a gun washer with a recycler is the highest-return combination we sell, and it’s why we quote them together. The gun washer contains the solvent; the recycler keeps it in service. Tell us your current solvent and disposal spend and we’ll run the payback with your numbers rather than generic ones.
Safety and compliance
An enclosed gun washer is not just a convenience item. It reduces employee VOC exposure, keeps ignitable solvent in a closed container rather than an open bucket, and gives you a defensible answer when an inspector asks how you handle gun cleaning. Solvent units should be properly grounded and bonded, kept closed when not in active use, and sited per your local fire code. Recovering and reusing solvent also helps keep you under waste-generator thresholds that get expensive to cross.
Which one fits?
- Solvent coatings, low volume — GW300M or S50M manual
- Solvent coatings, tight on floor space — GWM100 TWIN or GWA200 wall-mounted
- Solvent coatings, steady volume — GW500A, S10A, or S20A automatic
- Two painters cleaning at once — GMWA600 TWIN dual-station
- Running both solvent and waterborne — GMWA700 PureTech hybrid, or two dedicated machines
- Waterborne, low volume — E50M or E100M
- Waterborne, higher volume — E300A or E800A
- Any shop dumping solvent as hazardous waste — add a solvent recycler; it changes the economics of everything above
Where gun cleaning fits in the bigger line
Spray gun cleanup is one station in a finishing line that starts with surface prep. If you’re building or rebuilding that line, From Blasting to Painting lays out how blasting, painting, and cleanup connect — and how designing them together makes each step cheaper than buying them one at a time.
Get a recommendation
Tell us what you spray, how many guns you clean a day, and what you currently pay for solvent and disposal, and we’ll tell you which machine fits and what the payback looks like. Request a quote.
