The Complete Guide to Door Jamb Detailing and Protection

Ensure the vehicle panels are cool to the touch. Detailing door jambs in direct 40°C sunlight will cause chemicals to flash (dry) instantly, leading to unsightly chemical staining on the paint and plastics. Work in a shaded garage or under a carport during the cooler morning hours.

Before introducing water, use a soft brush or compressed air to blow out loose red dust, sand, or dried leaves. This prevents the debris from turning into a thick mud that can clog drainage holes at the bottom of the doors, which is a common cause of internal door rust.

Prepare your APC solutions in dedicated spray bottles. For standard summer maintenance, a 1:10 ratio of APC to water is sufficient. If you have recently returned from a 4x4 trip with heavy grease or mud, prepare a stronger 1:5 solution. Always use demineralised water if you live in a hard-water area to prevent spotting.

Identify sensitive electrical components such as exposed wiring looms, door speakers, or aftermarket lighting. While modern connectors are weather-resistant, avoid direct high-pressure water. Use low-tack automotive masking tape or a plastic wrap to cover any non-factory modifications.

Open one door at a time. Using a low-pressure setting or a spray bottle of water, dampen the jamb. Apply your diluted APC (1:10) liberally to the painted surfaces, hinges, and the lower door lip. Let it dwell for 2-3 minutes, ensuring it does not dry. This dwell time allows the surfactants to encapsulate red dust and break down oily residues.

Use a medium-sized detailing brush to work the APC into the door hinges and check straps. Use a 'stippling' motion (poking) to get bristles into the tightest gaps where grease and dust collect. You will see the foam turn brown or red as the contaminants are lifted from the surface.

Gently scrub the rubber weather seals with a soft microfibre or a dedicated soft brush. Dirt trapped in the folds of the rubber can cause friction against the door frame, leading to squeaks and premature wear. Ensure you clean the underside of the seal where it meets the metal body.

Using a pressure washer with a 'stubby' gun, rinse the jamb from the top down. Hold the nozzle at a 45-degree angle pointing away from the interior to prevent water ingress into the cabin. Use short bursts of water. Visual check: Ensure all soap suds are gone, especially from the hinge pockets.

If the paint feels 'gritty' after washing, it likely has embedded salt or fallout. Use a fine-grade clay bar with plenty of lubricant (soapy water or dedicated clay lube) to glide over the flat painted sections. This creates a smooth surface for the sealant to bond to, ensuring longer-lasting protection.

Dry the jambs immediately using a dedicated microfibre towel or a filtered air blower. Pay special attention to the bottom of the door where water pools. Leaving water to air-dry in the Australian heat will result in calcium spots that are difficult to remove without polishing.

If the factory grease is heavily contaminated with sand or grit, use a dedicated degreaser and a stiff brush to remove it completely. It is better to have a clean, dry hinge briefly than one lubricated with 'liquid sandpaper' (sand-filled grease).

Apply a high-quality spray sealant (like Bowden's Own Bead Machine) to the painted areas of the jamb. Spray onto a microfibre applicator first, then wipe onto the paint to avoid overspray into the interior. Buff off after 30-60 seconds. This provides a hydrophobic barrier against red dust and salt.

Apply a water-based UV protectant (like 303 Aerospace) to all rubber seals. Apply to an applicator and wipe on, ensuring even coverage. This prevents the rubber from drying out and cracking under intense UV radiation and keeps the seals supple for a perfect airtight fit.

Apply a small amount of white lithium grease or a dry Teflon-based lubricant to the door hinges and check straps. Open and close the door several times to distribute the lubricant. Wipe away any excess to prevent it from attracting fresh dust during your next drive.

Check the drainage holes at the bottom of the door one last time. Ensure they are clear of any debris or wax buildup. Wipe down the interior door card edges to ensure no APC or water spots remain on the leather or plastic trim.