Read http://www.truetex.com/pool.htm
This mentions using acid and sanding.
An 'orbital sander' is one in which the motor rotates the sanding plate rather than imposing a back and forth movement. - This is the commonest and mildest wood sander.
A store that can repair a random orbital sander is your local home improvement store that has a section of the store where workers repair your things, such as Home Depot.
B. flexable coupled counterweight
Orbital would be enough for refinishing. Much less chance of damage to the floor also. Unless you have used one before or the floor needs leveling, a belt sander can ruin a floor very quickly.
The DeWalt D26453K is one of the best selling orbital sanders on Amazon.com right now. From all the reviews I have read, it seems like it is a really well built sander that is powerful and easy to use.
Orbital sanders range in price from $30.00 to hundreds of dollars. With that in mind, the average price hovers right around $100.00 for a decent sander that won't give the user any trouble or break down too quickly.
Orbital sanders can be purchased at most home improvement stores. Some of the more popular places to shop for them are Lowes, Walmart, Home Depot, or Sears.
Random orbital sanders are an excellent sanding tool and are especially great on larger, tougher jobs. The sanders work at a very high speed and can make quick work of difficult sanding jobs. However, that high speed can create problems. If you are working with soft woods, a lighter touch is required as orbital sanders have a tendency to leave striations. The sander must always be kept flat to keep from damaging the wood. Take care not to tilt the sander as it will cut into the wood. If you have a large tough job, choose a random orbital sander.
I don't know if the pros recommend it, but I've used my orbital sander with fine (150 grit) paper. I attach my shop vac to the sander's output and even vent the shop vac out a window for a near dustless sanding job. You do have to be careful. Even light pressure on the sander can eat through the mud very quickly or rough up the drywall paper and tape.
I scrape as much as possible with a strong metal spatula then sand off the remainder with a rotary sander. -It's possible to get it all off easily with a belt sander but this method makes a lot of dust.
If the sander pad has accumulated debris, try cleaning with compressed-air or a vacuum. The hooks on the sander pad become damaged over time and will not engage the loops on the sanding disk, especially if you apply a lot of pressure when using the machine. Buy a replacement pad. The Rigid line is not that old, so they should be readily available. Unless you are using the sander for sculpting or shaping, the weight of the sander alone should be all that is required. If not, you need to use a lower grit.
Oil filter wrench, one-half inch socket and orbit sander are tools. They begin with the letter O.