Can I use any normal small grinder for wet polishing? I want to polish concrete to smooth like with laminated shutters. what grits do I need?
996365
Most small grinders spin to fast. Rpms should be at 3000 or less so you probably need a varible speed one. And they work much better with water. Without water they get too hot. I used mine with a random orbit sander since I did not have a polisher that can use water.
996366
You can use a regular (3 1/2 -4 inchgrinders for polishing,however I suggest a variable speed, polishing concrete I would start with 80 grit and progressively work up to 800. At the very least use a Makita or Bosch angle grinder the cheaper ones are not double insulated(bad for wet use) VERY noisy and they don't run smoothly.....if you want to spend the money the best grinder to use for polishing is a matabo variable speed,also flex makes a good hi end grinder.....use a sponge to wet surface keep it wet and have at it.
996367
You can. But 2 things. One is using small grinder 110v with wet things not a good idea. Two the disks tends to go out of balance from super speed. I used 18v cordless one and I used water with it. I got good result. You can start with lower grits as the lower one is to even thugs up. The higher the grits the smoother the finish. Good luck.
365248
No! DON'T EVEN THINK ABOUT THAT? Use sanpaper, starting with 200 grit. Finish with 600 grit. If it is real bad gel coat, consider filling gouges weth gel coat, sanding andpossibly reshooting gel coat in real bad areas. Always sand out finish and polish with non wax fiberglass polish.
17180
I would think water is fine. The idea is removing grit, not pasting it in. Water also cools down the process.
2013453
I will use diamond grinder to remove most of the concrete first, then use above item for clean smooth finish.
1838325
I use the 120 and 240 grit. Remember the higher the grit number the smoother the nail will be and the less likely it will split and crack.
1816321
hey delores, i bought this kit and for the money was great... i don't know how large or small you are going with them but the spaces between the grit might be too great if your pieces are quarter size or smaller! i have no doubt it will polish, just don't know your process. any more questions i'll try to answer, mike
796287
i grind coffee...don't need real clean between grinds....I'd suggest the brush that Amazon or a hardware store sells
903721
You can use a flat file or a bench grinder if you have one. It's best to sharpen before each use.
748881
It will certainly be able to grind down the material. The metal disk is especially aggressive and can quickly eat through concrete. The polishing pads aren't nearly as aggressive, there's quite a performance gap in-between the metal grinding cup and the coarsest pad (though that's not a problem for regular use, I'm just saying your options might be limited for what you're doing). As another person said however, this is a messy process. Even when you make good use of the leather velcro strap and a wet/dry vacuum to help contain the water, it gets everywhere.
1929030
Qualified yes ! you need tools to grind , sand , and then polish. Small pieces . The set of polishes are small !
1906963
I agree with the other answers as well, buy the right machine for grinding. I suggest a Porter Cable grinder, I personally use one with grinding/cutting/sanding wheels on it.
2242014
Yes. In fact, if you came to me to ask which tool to use to sand down clear coat to 800-grit level smoothness, I would say a random orbital sander(5-6" is most common for the curves of a car or boat, 10-12" is faster for 50+ft boat or large trailer) is beat. The weight and size of this particular model makes it easy to sand at shoulder height or above your head or for long hours. I had this model for years and swear by it. If this is a one time project or smaller than a table, save money by just buying a 5-6" random orbital palm sander. I am heavily disappointed in the crap quality of the buffer pad. The sponge is glued on and comes off as soon as its hot. The nature of sponge allows it to just peel away. So don't get excited about the 2-in-1 option. For best results when using sander, use 220 grit to get through clear coat, 180 is pushing it and 120 may take off more than you want but is my favorite if you can do it right. 120 (as long as you don't cut through at an angle by accident) will take off the most bang for your buck. A 2'x2' area can be done in like 45-60 seconds. Use the upper right quadrant (12-3pm on a clock) to take off layers in a methodical up down or left right slightly overlapping motion. As you leave an area, Go back over Lightly with pressure more evenly distributed on pad. Then go over with 220 same way. Then probably 400. Past that you are getting into wet dry paper and I have never used this machine with wet dry. It's a great way to get to 800. Make sure you have a pad, a sponge, a cloth or something to keep your fingertips from leaving an inconsistent finish. Or just make your hand into a pad like surface. The short answer? Yes.
1122656
You can either buy the Porter Cable sanding disks for this which I personally have never used, or, what I do use are after market 9" hook and loop pads as are 9" hook and loop sanding discs in many grits which are significantly lower in cost than the Porter Cable original equipment sanding discs with integral pad.
800486
It's a die grinder. Not made for that. Use a drill with a rotary wire brush. Use a slow speed buffer for buffing with a 5 to 7 inch pad. However, if you have those small rotary buffs from Eastwood - the kind you might buff a wheel or aluminum manifold with, it would be suitable.
2260089
Barry if you use the water I don't see any problem. I have done about 60 SF of counter top and about 30 LF of 4" edge. From the appearance and feel of the pads they should easily do another job probably several more. I started out using the cup wheel to aggressivly get down to the aggregate - after doing about half of the top I started using the 50 grit pad as it is easier to control the depth and not nearly as aggressive. I have some pictures of each stage if you are interested. A word of caution - depending on how you plan to seal and finish your tops I would caution you about going beyond the 200 grit. Remember you MUST seal concrete or it will stain badly with spills - grease etc. I'm using a water based acrylic sealer which can be applied even after 800 - 1000 grit polishing. If you haven't already poured your tops make sure you use a good concrete mix. I used the big box 4000 PSI mix and added about 12 % portland type II cement to each bag. That gives you a denser concrete that is easier to finish and slightly more impervious top. I'll gladly answer any additional questions.
1581506
It's part of what you need to fill the tumbler. The different sizes of grit are used to take stones for jewelry from a rough polish to a final smooth polish. These help prevent the stones from chipping as you polish them.
2024814
Not recommend for this use. If you use water it really messes with the variable speed. Makita makes a nice electric polisher.