Pallet knife is mainly used when applying BL13 Leather Filler. The blade of the pallet knife is flexible which helps when applying filler onto contoured areas. Once filler has been used, wipe the pallet knife clean of all filler as this can affect any further applications as you may have dried filler stuck to the knife. If you have dried filler on the knife then run it under hot water to remove it.
Unlike the cheaper plastic pallet knife, the blade is harder wearing and much less likley to become damaged which can affect further applications of filler.