Tackling Tough Truck Fenders

At Drive Protected, we're committed to showing the unfiltered reality of PPF installs, especially on heavy-duty trucks where contours push film to its limits. This video features Eric applying full Defense+ Clear PPF to the rear dual fender (box side) of a 2026 Ford F-350 Dually. Using tips from a viewer comment, he refines the approach from a previous partial install, focusing on tension management for better results.

Watch the hands-on process, challenges, and pro techniques:

Why Full Fender PPF on a Dually?

These trucks see serious abuse! From rocks, gravel, salt, and debris in wheel wells. Full PPF protects the factory paint, self-heals minor scratches, and keeps resale value high. The rear box sides are notoriously tricky: deep valleys, sharp corners, protruding "fingers," and high built-in tension that can cause lifting or distortion if not handled right.

Key Steps & Techniques

• Prep & Solutions: Slip assist gel on the panel; slip solution (Johnson's baby shampoo + distilled water, 2 pumps per 32 oz) on the adhesive side for glide; tack solution (hot water + 20% isopropyl) underneath for bonding.
• Starting Strong: Anchor at the top corner first, stretch downward to reduce overall tension. Tack inner areas, then pull outward.
• Tension Management: Lift positive tension lines/fingers, spray tack underneath, squeegee at angles to avoid pops. Relief cuts release stubborn valleys, apply full body weight (~330 lbs) for pressure, then stretch and secure.
• Section Work: Divide into halves; hook around corners, squeegee front-to-back with gel to push out air pockets. Re-tack and work downward on problem spots.
• Finishing: Overnight cure to check for pulls; final trim and post-heat in the morning. Customer wants zero visible edges or imperfections, protection first, perfection secondary.

"We stretched the limits of our Defense+... it held up quite well." 

Light truck color hides stretch marks; darker would show the film's effort more clearly. 

Tips from Our Shop

• Start top-down on tension heavy panels to minimize fights.
• Relief cuts + heavy pressure + generous tack solution tame valleys and fingers.
• DIY demands patience, practice on smaller areas; pros still battle these.
• Defense+ is forgiving and tough, self-healing, high-stretch for demanding jobs like this.
• Slip Assist Gel makes repositioning easier on big, contoured surfaces.

If you've installed on dually fenders or similar, drop your best tension tricks in the comments. We're all about improving together at Drive Protected.

Ready to protect your truck? Shop Defense+ PPF and Slip Assist Gel