## Table of Contents

1. [Why do aircraft glass and acrylic deserve special attention?](#why-it-matters)
2. [Types of transparent surfaces in aircraft](#types)
3. [The main challenges in Portugal and Spain](#challenges)
4. [Correct cleaning — what to use and what to avoid](#cleaning)
5. [Protection with nano-ceramic coating](#protection)
6. [Nasiol GlassCoat Marine — the solution for coastal aircraft](#nasiol-glasscoat)
7. [Step-by-step application](#step-by-step)
8. [Regular maintenance](#maintenance)
9. [Conclusion](#conclusion)

Visibility is the foundation of flight safety. Dirty, scratched, or salt-encrusted glass and acrylic panels are not just an aesthetic issue – they are a real safety risk that directly affects a pilot's ability to assess airspace, detect other traffic, and perform safe landings.

In Portugal and Spain, where most airfields are coastal and UV indices are among the highest in Europe, aircraft cockpit glass and acrylic degrade faster than in almost any other environment. This technical guide covers correct cleaning, products to use and avoid, and long-lasting protection for these critical surfaces.

## 1. Why do Aircraft Glass and Acrylic Deserve Special Attention? {#why-it-matters}

An aircraft's transparent surfaces are subjected to conditions no ground vehicle faces:

- **High-speed particle impact:** Insects, dust, and atmospheric particles impact the windshield at speeds of 150 to 300 km/h, creating progressive micro-abrasions that progressively cloud the acrylic over time.
- **Extreme thermal variations:** From ground heat to negative temperatures at altitude, acrylic constantly contracts and expands — making it susceptible to micro-fissures if not properly maintained.
- **Intense UV radiation:** Unprotected acrylic yellows and clouds progressively — a particularly relevant problem for aircraft parked outdoors in Portugal and Spain.
- **Sea salt:** Salt spray deposits on the glass and creates residues that, if not removed regularly, become progressively harder to eliminate without risk of scratches.

For a comprehensive overview of aircraft detailing, consult our [Complete Aircraft Detailing Guide in Portugal](/blogs/detalhe-aviacao/detalhe-aeronaves-portugal-guia-limpeza-protecao).

## 2. Types of Transparent Surfaces in Aircraft {#types}

Not all transparent aircraft surfaces are alike — and this distinction is critical for choosing the correct products:

### Acrylic (Plexiglas / PMMA)

The most common material in general aviation aircraft. Lightweight, impact-resistant, and with good optical clarity — but extremely sensitive to solvents. Acetone, concentrated isopropyl alcohol, ammonia, and many conventional automotive cleaners will irreversibly dissolve or cloud acrylic. This is the most common and destructive mistake in cockpit maintenance.

### Tempered or laminated glass

Present in some heavier aircraft and jet aircraft. More solvent-resistant than acrylic, but equally susceptible to mechanical scratches and salt deposits.

### Polycarbonate

Used in some sports aircraft and ultralight canopies. Even more solvent-sensitive than acrylic — requires products specifically formulated for polycarbonate.

**Fundamental rule:** If you are unsure of the material of your aircraft's panel, consult the manufacturer's manual before applying any product.

## 3. The Main Challenges in Portugal and Spain {#challenges}

The specific conditions of the Iberian Peninsula and the Atlantic islands create particular challenges for aircraft transparent surfaces:

- **Omnipresent sea salt:** In Madeira, the Azores, Algarve, Costa Vicentina, and the Mediterranean coast, salt spray is constantly present. Salt deposits on glass create white marks that, if not treated regularly, require increasingly aggressive products to remove — increasing the risk of damage.
- **Intense UV:** Acrylic yellowing is significantly faster in Portugal and Spain than in Northern European climates. Aircraft parked outdoors without adequate UV protection show visible acrylic degradation within a few years.
- **Sahara dust:** Frequent occurrences in the Iberian Peninsula and Atlantic islands. The abrasive particles in this dust, if removed with incorrect technique, easily scratch acrylic.
- **Abundant insects:** Especially in rural airfields, insect accumulation on the windshield is a constant problem. Dried insects are harder to remove and require careful technique to avoid scratching the acrylic.

For more information on how the coastal environment specifically affects aircraft in Portugal and Spain, consult our guide: [Aircraft Detailing in Coastal Environments: Madeira, Azores and the Iberian Peninsula](/blogs/detalhe-aviacao/detalhe-aeronaves-ambiente-costeiro-madeira-acores-peninsula-iberica).

## 4. Correct Cleaning — What to Use and What to Avoid {#cleaning}

### What NEVER to use on acrylic

- Acetone or nail polish removers — they dissolve acrylic
- Concentrated isopropyl alcohol — clouds and weakens acrylic
- Ammonia-based products — including most household glass cleaners
- Abrasive sponges, scouring pads, or paper towels — cause irreversible scratches
- Conventional automotive cleaners not certified for acrylic
- High-pressure spray directly on acrylic

### What to use on acrylic

- Deionized or distilled water for rinsing
- Specific aviation acrylic cleaners — formulated without harsh solvents
- High-quality, soft, and clean microfibers — never contaminated multi-purpose cloths
- Gentle linear movements — never circular movements that create visible swirl marks on transparent surfaces

### Insect removal

Dried insects are one of the main risks of scratches on acrylic. The correct method: abundantly wet with water before any mechanical contact. Wait 2 to 3 minutes to soften the residue. Apply a specific acrylic cleaner and gently remove with a new microfiber in linear movements. Never attempt to remove dried insects with direct mechanical force.

### Salt deposit removal

First, rinse with abundant fresh water to dissolve soluble salt. For persistent mineral deposits, use a specific water spot remover for acrylic — slightly acidic pH but without solvents. The same principles apply to removing water spots on car paint — consult our guide [How to Remove Water Spots from Car Paint](/blogs/detalhe-automovel/remover-manchas-agua-pintura-carro) for technical reference.

## 5. Protection with Nano-Ceramic Coating {#protection}

After correct cleaning, applying a specific nano-ceramic coating for glass is the most important investment for maintaining an aircraft's transparent surfaces:

- **Hydrophobic layer:** Water, salt, and dirt slide off easily without adhering to the surface — keeping the glass cleaner for much longer
- **Improved visibility in rainy conditions:** In flight, water quickly drains from the treated surface, significantly improving visibility in precipitation
- **UV protection:** Delays acrylic yellowing caused by prolonged sun exposure
- **Ease of cleaning:** Insects and salt deposits do not adhere with the same intensity — each cleaning is significantly faster and requires less mechanical effort
- **Protection against micro-abrasions:** The ceramic layer creates a harder surface that better resists particle impact

## 6. Nasiol GlassCoat Marine — the Solution for Coastal Aircraft {#nasiol-glasscoat}

[Nasiol GlassCoat Marine](/products/nasiol-glasscoat-marine-50ml) is a nano-ceramic coating developed specifically for glass in high-demand environments — intense salt, high UV, and constant humidity. The same technology that protects boat glass in the most demanding ocean conditions directly applies to Portuguese and Spanish coastal aircraft.

Its specific features for aircraft:

- Formulation without aggressive solvents — safe for aviation acrylic
- Exceptional resistance to sea salt and UV
- Highly durable hydrophobic and oleophobic layer
- Immediate improvement of visibility in rainy conditions
- Compatible with tempered, laminated, and treated acrylic

For glass in non-marine environments or aircraft based inland, [Nasiol GlassShield](/products/nasiol-glasshield-50ml) is the suitable alternative — equally effective but formulated for less aggressive saline conditions.

## 7. Step-by-Step Application {#step-by-step}

### Step 1 — Deep cleaning

Perform a complete cleaning as described in section 4 — removal of insects, salt deposits, and mineral stains. The surface must be completely clean, dry, and free of any residue before application.

### Step 2 — Degreasing

Wipe a clean microfiber lightly dampened with highly diluted isopropyl alcohol (maximum 10% in distilled water) over the surface. This step removes fingerprints and product residues that interfere with coating adhesion. For acrylic, always check compatibility before using alcohol — prefer an acrylic-specific degreaser if available.

### Step 3 — Applying Nasiol GlassCoat Marine

Apply [Nasiol GlassCoat Marine](/products/nasiol-glasscoat-marine-50ml) with the included applicator in linear movements. Thin and even layer — cover the entire surface without excess product. Always work in the shade with a cool surface.

### Step 4 — Curing and polishing

Wait the flash time indicated in the instructions. Remove with a clean, soft microfiber in linear movements. Second pass with a dry microfiber to