How Do You Spray Matt Clear Coat?

Matte clear coat is a type of automotive clear coat that provides a non-glossy, matte finish. Unlike traditional glossy clear coats, matte clear coat has a flat, low-sheen appearance. Matte clear coat has become increasingly popular in recent years as car enthusiasts look for unique finishes to customize their vehicles.

The main purpose of matte clear coat is to protect the basecoat paint while providing an understated, sophisticated matte aesthetic. While glossy clear coat makes the paint ‘pop’, matte clear coat mutes the paint for a more subtle look. Matte clear coat also resists scratches and UV damage just like traditional clear coat. Overall, matte clear coat allows you to get the protective benefits of clear coat while achieving a unique, eye-catching matte finish.

Supplies Needed

To properly spray a matte clear coat finish, you will need the following supplies:

• Matte clear coat spray – This is the main coating ingredient. There are various brands that manufacture matte clear coats such as Tamco, Por-15, and Mudpaint (https://tamcopaint.com/products/matte-clearcoat, https://por15.com/products/matte-clear-coat, https://mudpaint.com/shop/finishing-products/matte-finish-clear-coat/).
• Paint gun or aerosol can – The matte clear coat needs to be applied with a paint gun for large surface areas or an aerosol can for small projects.
• Masking tape – To protect areas you don’t want coated, mask them off with masking tape.
• Drop cloths – Use drop cloths or paper to protect floors and furnishings from overspray.

Having all the proper supplies on hand will make the spraying process smooth and efficient.

Surface Preparation

Proper surface preparation is crucial for achieving an even, smooth matte finish. First, thoroughly clean and scuff the surface to remove any dirt, oils, wax or other contaminants. Use a degreasing agent and then sand with 400-600 grit sandpaper to create a roughened profile for the clearcoat to adhere to. Be sure to sand off any existing glossy clearcoat or paint down to a matte finish. Mask off any areas not being sprayed using high quality masking tape and paper.¹

Any gloss areas not properly sanded will show through and ruin the matte effect. Wipe down the surface afterward with a tack cloth to remove dust. The surface must be completely clean and dull before spraying the matte clearcoat. This prep work is tedious but absolutely essential for proper adhesion and an even finish.

Spray Gun Setup

Proper spray gun setup is essential for achieving an even, smooth finish with your clear coat. Here are some key steps:

Attach Right Nozzle and Tip

The nozzle and tip size determine the width of the spray pattern and how much clear coat is released. For clear coats, a 1.3-1.4mm tip is common. Make sure the nozzle and tip are clean before attaching them.

Adjust Pressure

Consult the product specifications for the ideal pressure, which is typically 29-40 PSI for HVLP spray guns. Set your compressor or turbine’s pressure regulator accordingly. Too low pressure can cause an uneven pattern, while too high pressure leads to excessive overspray.

Test Spray Pattern

Spray a test area on cardboard or scrap material to ensure you have a uniform, even pattern without heavy edges or tails. Adjust pressure or other settings if needed.

Spraying Technique

Proper spraying technique is crucial for achieving an even, smooth finish with the matte clear coat. Follow these techniques:

• Hold the can 6-8 inches away from the surface. Do not hold too close or too far away.

• Use light, even coats. Do not apply too heavily or you may get drips and runs.

• Overlap your strokes slightly to ensure complete, uniform coverage. Move the can in a steady back and forth motion.

Applying multiple thin coats will provide better results than one thick, heavy coat. Patience leads to the best finish.

Between Coats

It is crucial to allow proper flash time between coats of matte clear coat. The flash time allows the solvents in the previous coat to evaporate so the next coat can adhere properly. Refer to the manufacturer’s recommended flash times, as this can vary by brand and environmental conditions. Most matte clear coats require 10-15 minutes between coats.

Be sure to inspect the base coat for any drips or runs before applying the next coat. Fix any imperfections because matte clear coat will accentuate them. Lightly sand any drips or runs and reapply base coat to that area if needed. Once the base coat is smooth and level, continue on to apply the next coat according to the manufacturer’s instructions.

Cite: http://www.autobodymaster.com/plugins/pds/ABM_Matte_Clear_PDS.pdf

Final Coat

When applying the final coat of matte clearcoat, you’ll want to spray on a slightly heavier layer. The goal is to apply enough product so that the gloss disappears completely, leaving behind a uniform matte finish.

Per the advice from SuperSybon, “Apply the matte clear coat evenly using a high-quality spray gun. Ensure you maintain a consistent distance from the car’s surface and apply a wet coat without any dry spray.” They recommend spraying two medium wet coats instead of one very heavy coat for the best results.

Similarly, Sinnek Academy suggests “Apply a uniform coat of matte clearcoat, trying to avoid cloudiness. Application factors such as the speed and movement of each stroke, the distance between the surface and spray gun, and spray pattern overlap all affect the final appearance.”

Spray until the clear coat blends smoothly and consistently across the surface with no glossy spots remaining. Allow proper flash time between coats. Check for full matte coverage and apply additional product as needed to achieve a uniform flat finish.

Drying Time

After applying the final coat of matte clear coat, allow the coating to dry for 24 hours before using the sprayed object. The matte clear coat needs sufficient time to fully cure and harden. Rushing the drying process can lead to issues like hazing or loss of gloss.

Be aware that drying times may be longer in cool or humid conditions. Low temperatures and high humidity will slow down the evaporation of solvents in the clear coat. Ideal drying conditions are around 70°F with moderate humidity levels. Drying in a dust-free space is also recommended to prevent contaminants from sticking to the uncured coating.

Test the hardness and tackiness of the clear coat with a fingernail before using the coated object. The surface should be smooth and resistant to scratches at the 24 hour mark. Allow extra drying time if needed before exposing the item to use or handling.

Maintenance

Matte finishes require gentle care and maintenance to keep looking their best. Because matte paint has a flatter surface with no gloss, it shows scratches and swirls more easily than traditional finishes. It’s important to handle a matte painted surface with care, especially when newly applied.

According to PPG’s Matte Finish Guide, you should clean matte paint gently using a soft cloth or microfiber towel with a mild cleaner or soap and water. Avoid using abrasive pads or brushes that could scratch the surface. Use light pressure and wipe in straight lines rather than circular motions.

It’s also a good idea to avoid automatic car washes with brushes. The agitation can lead to marring on the matte finish over time. Hand washing is gentler. You can apply a sealant or wax specifically formulated for matte paint to add an extra layer of protection when caring for the finish.

Tips and Warnings

When spraying matte clear coat, it’s important to take safety precautions. Spray painting should always be done in a well-ventilated area, according to the product’s safety data sheet. Wear protective equipment like gloves, goggles, and an organic vapor respirator. Avoid skin and eye contact by covering exposed skin and wearing protective eyewear. Any spills should be cleaned up promptly, and all materials should be disposed of properly according to local regulations. Following the product instructions and taking appropriate safety measures will help ensure you safely achieve the desired matte finish.