wo actually seeing the door , we'd use a7" elec grinder WITH DUST SHROUD AND GOOD VACUUM ,,, pick out a cup wheel w/turbo diamond segment arrangement rather than concentric circular setup, 12 segs swill remove conc faster than 24 segs...tons of dust so be aware. the ground area will have a different surface texture of course compared to the unground area. if int send me a pm
good luck !
Last edited by stadry; 10-17-2021 at 08:39 AM.
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