
Surface process engineering · OEMs & tier-1 suppliers
Results on the line.
Robots programmed and simulated offline, processes stabilized on your shopfloor — savings you can measure, payback within a year.
Trusted across the line

In the client’s own words
„Von allen eingesetzten Engineering Dienstleistungen hat S4P die beste Performance abgeliefert. Ein breitgefächertes Erfahrungsspektrum sowie flexibles, praxisorientiertes Arbeiten, welches das Tun in den Vordergrund stellt …“
„Wer Hands-on und Shopfloor-Typen sucht, ist bei der S4P genau richtig.“
„Durchsetzungsvermögen und Überzeugungskraft geprägt mit einem fundamentalen, fachlichen Background sowie einer systematisch, analytischen Denkweise … haben das Projekt für VW erfolgreich werden lassen.“
Fifty years of coating know-how, in one team.
s4p was founded in 2009 after more than 50 years of combined, hands-on experience in car-body and plastic-part surface coating across the automotive industry. We are a small team of well-chosen experts, drawn from across the globe and proven on the line, not just on paper.
Experts on the line in
Where the money is made on the line.

Painting
A flawless finish, with less paint wasted.
Booth, robot path, and dosing tuned until overspray vanishes and cost drops.
- Overspray and material loss reduced
- Flawless finish, mirror-gloss reflectivity
- Live monitoring and preventive maintenance
- Faster, cleaner facility launches
Measured on the line, not the slide deck.
Team
50+ yrs
Combined line experience
A small senior team — every engineer proven on the line, not just on paper.
2009
Founded
Built on careers that started decades earlier in automotive surface coating.
Senior only
Who does the work
The people you meet are the people on your line — no leverage pyramid.
Reach
6 regions
On-site, worldwide
Experts on the line in the EU, USA, Mexico, China, India and RSA.
OEM + Tier-1
Both sides of the interface
We have run the OEM–supplier interface from both sides.
On the line
Shopfloor, not slide deck
We program, dose, plate and stabilize on your line, alongside your team.
Method
≤ 1 yr
Payback
The bar our engineering is scoped against: return on invest within a year.
Before / after
Documented results
Every engagement measured on the line, per project — never averaged.
Transfer
Know-how stays
The method is handed over, so the line keeps improving once we are gone.
Documented before/after, per project — never averaged.
How we engage.
Analyze
Assess the line, the tooling, and the data.
Plan
Prepare a concrete action plan with the cost, the function, and the timeline made explicit.
Implement
Program, dose, plate, and stabilize on the floor, alongside your team.
Release
Validate against OEM milestones and hand over a process that holds.
The know-how stays with your team.
We transfer the method, not just the result.
Coating processes
Atomization, film build, and booth climate, tuned to a repeatable window.
Robot programming
Path, dosing, and shaping air your own team can adjust without us.
Process diagnostics
Reading the line — data, tooling, application — to find the real weakness, not the symptom.
Bring us your hardest line. We will give you the number.
Tell us about the part, the booth, or the defect. We respond with a concrete read on where the time and the material are going.
or write directly: info@s4p-engineering.ch
Your mail lands with a senior process engineer, not a sales desk.
EUUSAMexicoChinaIndiaRSA



