Inspect the valise for any signs of damage, wear, oil, acid (testing with litmus paper), grease, etc.
Hlolela ingxowana naziphina impawu zomonakalo, nxiba, amafutha, i-asidi (vavanya ngephepha elinomchiza elisetyenziswa ekuqondeni ukuba iasidi ikho entweni ethile), amafutha, njalo njalo.