Reputation: 12307. As to the cost for others to do it. A dining table is typically $1000 to re-finish (top, sides, legs and leafs). We had three small table tops only refinished fo $300.DIY just sand the finish off, then sand with 100, 120, 150 220 grits.Use a good poly, and sand with 220 between coats.s to the cost for others to do it. A dining table is typically $1000 to re-finish (top, sides, legs and leafs). We had three small table tops only refinished fo $300. DIY just sand the finish off, then sand with 100, 120, 150 220 grits. Use a good poly, and sand with 220 between coats.