Last week I found a nice pair of Arco leather rigger gloves I acquired somewhere. They are really well made with reinforced thumb & index finger but that leaves them really stiff & difficult to break in. What can I use to make them more pliable? I was thinking of trying the dubbin or leder gris I use on my work boots but I don't want to make them flammable as they will be used for welding & fabricating. Why is it that with most leather gloves by the time they are nice to wear they are nearly worn out!