Ian,on my wheel arch(ABS) it mysteriously gained a small bit of damage,I repaired the cracks by removing it,cleaning it,scuffing the inside with a green pan scrub. using gorilla tape carefully on the outside, checking the inside to ensure the tape was holding the crack closed and perfectly level I then applied this adhesive.Although used for wood I have used it before on other items,it expands and sets hard an has excellent grip.Gloves should be worn,whilst spreading it(isn't much use if the repair can be seen though)
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