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Tree resin (sap)
Appears like a dark brown/ rust red colour raised surface mark, some of the most common resinous tree sap types are: White Pine, Ponderosa Pine, Walnut (also secretes an oily residue) Maple, Oak, Popular, and Blue Spruce, none of which are water soluble, the acidic content of the sap will etch the paint surface; causing a concave surface.
Try any of the following:
• Limonene (citrus-based) cleaner (P21S Total Auto Wash) will both emulsify and neutralize the acid or use an alkaline rinse of baking soda and water as soon as is practical is highly recommended.
• 1:1 solution Isopropyl alcohol (IPA) and distilled water. The alcohol content acts as a drying agent, which will extract the acid, then thoroughly flush with water to rinse away any grit or sand, etc or use detailers clay to encapsulate it, re-spray the area let it react for 2-3 minutes and wipe dry.
• If it is sun hardened use a plastic razor blade to remove the top surface of the resin and then soak in IPA.
• Glass cleaner (do not use one that contains ammonia; as it acts as an acid accelerant
• Gel alcohol hand cleaner (PurellŪ) Place a small amount on to a first aid gauze pad and apply to effected area this will help it stay in place during the necessary react time. The alcohol content acts as a drying agent, which will extract the acid, then thoroughly flush with water to rinse away any grit or sand, etc or use detailers clay to encapsulate it, re-spray the area let it react for 2-3 minutes and wipe dry.
Replace paint surface protection
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