Get PVA glue mix it with water in 2:1 ratio (2 parts glue 1 part water) put the glue in on and around all the little cracks, let it dry for 2/3 days. Use sand paper and sand the bat gently to get a smooth surface. Oil the bat 2 times with a cloth, just enough oil to stain the whole surface of the bat. Knock it in for 4 hours starting lightly and increasing force as time passes and then apply a scuff sheet to the bat.