Concrete Polishing
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- 9 Days to polish -
- Polished vs epoxy -
Sourcing
- Orbital sander pads - [3]
- Use 6 of these at one time mounted to a common bar, if you have open space to work with. Each is under 4 lb, so 24 lb total + mounting bar. 3A each for a total of 18A
- Start with bulk grinding of rough spots - [7] - using a regular grinder:
- Start with 50 grit dry - $10 for one - [8]
Diamond Cups
How to Use an Orbital Sander
- 15 seconds per foot travel rate:
Lessons:
- collect dust, so you don't get larger abrasive spots from dust clumps
- Go slow - pigtails will shrink
- Calculations - if 15 seconds per foot, we have 39 passes lengthwise for one passthrough - meaning 1248 feet - meaning 5.2 hours per 500 sf pad. Save 20% by not doing under stairs and cabinets, you have 4.7 hours per pass. 5 sander gang gets that down to 1 hour. Definitely could use a holder for 6-10 sanders. If they can be ganged - that would be awesome.
- Don't skimp on the grits - go up more slowly, which is actually faster.
- Get the dust out - it clogs the sandpaper, and dulls it faster as you need to do more work
- Get extra velcro pads
- Store sander with pad on, so you don't flatten velcro hooks.
Other Options
- Good thread -
- Car polisher will work, and so will a variable speed grinder with diamond pads.
- Get this grinder with variable speed can be found elsewhere cheaper.
http://www.toolocity.com/5-makita-an...ble-speed.aspx. Pads - http://www.toolocity.com/4-hurricane...hing-pads.aspx. Pad holder - http://www.toolocity.com/4-back-holder-rigid.aspx
Concrete Countertop Details
- Includes filling voids with epoxy binder + concrete, then sealer, then wax, and silicone between slabs to fill in cracks.