Ceramic Coating at Ljubljana Jože Pučnik (LJLJ)

Why ceramic coating instead of another polish-and-wax cycle?

Wax sits on the surface for six to eight weeks before it breaks down under ramp wash and weather. Ceramic forms a chemical bond with cleared paint and lasts two to three years if you follow the maintenance wash schedule. Between now and the next application, every turnaround wash uses less water, sheds faster, and you spend fewer nights hunting for a last-minute slot because the belly stayed clean an extra month.

We start with clay-bar decontamination to pull out embedded brake dust, exhaust soot and mineral deposits that polishing alone will not remove. Paint correction follows—machine polishing with diminishing abrasives to level swirls, light oxidation and handling marks. Only when the surface reads uniform under a paint-depth gauge do we wipe it down with isopropyl alcohol and lay the first ceramic layer. The second layer goes on twelve hours later, after the first has flashed. Brightwork—nacelle lips, strakes, winglets—receives the same two-stage process; windows get a separate hydrophobic formula that improves visibility in rain and resists wiper chatter.

You collect a warranty document, a maintenance log and a supply of pH-neutral shampoo. Your line crew continues with rinseless or waterless washes as usual; the coating simply makes every wash faster and the aircraft stays presentable twice as long.

What changes at Ljubljana Jože Pučnik for a multi-day ceramic job?

The single runway—12/30, three thousand three hundred metres—handles everything from light jets to the occasional head-of-state widebody, and the airport is not slot coordinated. You will need a PPR at least twenty-four hours before arrival, issued by Fraport Slovenija, but once that is filed the process is straightforward. Elevation is one thousand two hundred and seventy-three feet, so density altitude remains benign even on summer afternoons, and the ILS on runway 30 is certified to Category IIIb if you arrive in the autumn valley fog that settles over the Ljubljana basin.

Handling agents present at the airport operate from the General Aviation Centre, which moved into the main passenger terminal a few years ago—former restaurant premises, before the staff security checkpoint. If your crew need to cross airside during the three-to-six-day hangar stay, the checkpoint is open from six in the morning until nine in the evening; outside those hours access goes through checkpoint R1 with prior notice to the Security Operations Centre. The GA Centre arranges customs, police, water, GPU and de-icing; out-of-hours service is charged per started thirty minutes, so coordinate tech-log signatures and any cabin work during daylight to keep costs predictable.

We bring our own hangar space and climate control. The ceramic cures best between fifteen and twenty-five degrees Celsius with stable humidity, and Ljubljana's continental climate swings wide—winter mornings below freezing, summer afternoons above thirty. Keeping the aircraft inside for the entire process means the coating flashes evenly and you do not wake up to dew on half-cured ceramic.

How does Central European weather affect the coating once you leave?

Ljubljana sits twenty-six kilometres from the city centre in a river valley that funnels cold air down from the Julian Alps in winter and traps heat in summer. Winter operations mean Type I and Type IV fluid on the airframe every few weeks, and both are mildly alkaline; untreated paint will dull and chalk faster. Ceramic resists that chemistry better than wax or a single-stage sealant, so the leading edges and belly stay glossy through a season of holdover-fluid applications.

Summer UV at forty-six degrees north is less fierce than the Mediterranean, but still strong enough to fade unprotected cheat-lines and degrade clear coat over two or three years. The ceramic layer absorbs and dissipates UV before it reaches the paint, slowing oxidation. You will still see some fade after thirty-six months if the aircraft lives outside, but it will be a third of what you would see on bare paint.

Spring and autumn bring rain that carries dust from the surrounding farmland. A hydrophobic coating means water beads and rolls off the fuselage and wings in seconds rather than pooling around fasteners and panel gaps, so you dry faster on the ramp and spend less time wiping down before the next leg.

What documentation and photo record do you produce for the tech log?

Before we touch the aircraft, we shoot a complete photo set under diffused hangar light—every panel, every seam, the belly, gear bays, nacelles and all brightwork. Those images go into a condition report that records paint depth at twenty standard points, notes any existing chips, scratches or corrosion, and lists which areas received extra correction passes. When the ceramic is cured and the aircraft is back on the stand, we shoot the same angles again so you can see the difference in gloss and clarity.

The maintenance plan is a single-page card that lives in the tech log or the flight-deck binder. It lists the application date, the product batch number, the recommended wash interval—usually every four to six weeks with pH-neutral shampoo—and the inspection schedule. We also note which areas are no-touch: pitot probes, static ports, avionics antennas and any OEM-specified surfaces. Your line crew or any competent handler can follow it without special training.

The warranty document covers delamination or hazing caused by application error. It does not cover damage from improper washing—harsh detergents, rotary brushes, or high-pressure wands aimed at panel edges—so the maintenance plan and the warranty work together. Keep one copy in the aircraft file, send another to your home base, and we keep the third with the photo archive so that when you return in two years we know exactly what we applied and where.

Is Ljubljana Jože Pučnik a sensible base for recurring ceramic work?

If your aircraft transits the Alps regularly—Munich, Zurich, Vienna, Milan—Ljubljana offers hangar availability without the week-long wait common at busier fields, and Fraport Slovenija's PPR process is faster than slot coordination. The airport operates without curfew restrictions, so if you need to reposition in or out at odd hours to meet a charter schedule, you can. We have worked with the same handling agents and security team for years, which means fewer surprises when you need an airside escort or a last-minute GPU on a cold morning.

For fleets running a two-or-three-year ceramic cycle, Ljubljana becomes a known quantity: you file the PPR, you know the hangar will be climate-controlled, you know the photo report and maintenance plan will be ready before you depart. That predictability matters when you are scheduling downtime around peak charter season or trying to align ceramic work with a cabin refresh in the same region.

What happens if you discover paint damage during the correction stage?

The correction process will sometimes reveal chips, stress cracks around fasteners, or corrosion that was hidden under dirt and oxidation. We stop, photograph the area, measure paint depth again, and call you before we proceed. If the damage is shallow—less than twenty microns into the clear coat—we can often correct it with an additional polishing pass and a thicker ceramic build in that zone. If it goes deeper, or if there is active corrosion, we recommend a touch-up by a paint shop before ceramic goes on.

We do not do structural paint repair ourselves, but we coordinate with the handling agent to bring in a local paint technician if you want the work done at Ljubljana rather than repositioning. That adds a day or two to the schedule, but it means you leave with a uniform finish and the ceramic warranty intact. If you prefer to defer the repair, we mask the area, complete the ceramic on the rest of the airframe, and note the exclusion in the warranty document so there is no confusion later.