sand down the cracks shove sum bondo or spot putty or resin in there and the sand it down thas what i did and fixed 4 cracks perfectly *bondo but thas b4 i covered the whole wdash n fiberglass lol. But for u jes sand the high ends down fill it up wit bondo n sand it until its uniform n paint it u'll be amazed if u want pics jes hit my aim up bo0gi3boy