Lower, Not sure if this was covered in your boat thread yet, but since you are ready to start the grinding portion of the rebuild, you need a Tyvek suit, gloves, ear protection, eye protection and a very good respirator. I like the 3M 6000 series myself, but others use similar types. Whatever you prefer, but you have to use something. A typical dust mask will not protect you. The very small micro size fiberglass particles will get by the typical dust mask and get into your lungs, you don't want that to happen.
And you certainly will question yourself as to why you decided to do this after you get started and see the mess grinding creates. Most everybody does, but stick with it, it gets way better after the grinding is finished.
Also most everybody, including myself, use a angled grinder with either 36, 40 or 80 grit flapper disks for their grinding. The courser the grit the faster it cuts. So select what you like again. I used the 80 grit to give a smother final finish before installed any new parts. But again, whatever works for you best. And the dust will go everywhere and look like it snowed around you boat.
Take pictures along the way so we can see what you're doing and add any ideas if you have any questions for us as well. Hang with it. :thumb:
