muriatic acid should work fairly well
There are a number of ways you could remove stains from worms on a vinyl liner. You could use cleaners.
You can't
If the cement is not too old, try water and a soft scrub brush.
Hammer and chisel to scrape it off, an assortment of putty knives.
no on paint! You will need to replace the liner.
Afraid not. Vinyl liner pools are built using "concrete receptor coping" into which the deck is poured. It also contains the "bead receptor" that the vinyl liner attaches to. Actually YES it can. You would want to do this during a liner replacement but it can be done. You would have to remove the concrete from around the perimeter of the pool, remove/ replace the "concrete receptor coping" with bead receiver, aluminum extrusion, form/pour a bond beam, then lay your stone. Not really an easy do it yourself job but it can be done.
No
It is best to remove the vinyl tile. If it is not on cement and is on wood you can install cement backer board. Be sure to put thin set under the board. If you spend the money and time to install ceramic tile and the vinyl tile comes loose all that $ is down the drain What is the best tile cement to use and this cement tile can be installed on vinyl tile and install ceramic tile on it
Yes, replace the liner. Nothing can put the color back into plastic or vinyl or glass or steel.
Be more specific please- what about removing it? cost? difficulty? What type of pool is it? fiberglass? vinyl liner? concrete?
Vinyl Liner
Komatsu PC 75 will rip out a steel wall liner pool like tin foil * Take out the liner * Tear down the walls * Break some holes in the cement for drainage * Fill it in with clean fill