Originally Posted by beamishken
Any sanding job you should be wearing a mask so just assume it's harmful and Wear appropriate gear
How successful you are at sanding depends on whether someone chucked sand in to make it none slip or used the proper polygrains or sawdust
If it's sand you'll go through a million disks trying to remove it because the sand is as abrasive as the disks
It looks more like tiny air holes than grit, so I'm not sure to be honest. It has to come off somehow as I can't lay the teak stuff until it's all up and gone.
It's gonna be a hard job I can see it