There are a number of ways you could remove stains from worms on a vinyl liner. You could use cleaners.
If the cement is not too old, try water and a soft scrub brush.
use acid of clorine :D
A 20 by 40 vinyl liner pool will cost around 1500 for the liner and 1500 for the labor. If you have a cement or vermiculite ( a type of cement) floor . If you have a sand bottom there is a extra charge for labor
no on paint! You will need to replace the liner.
As long as the vinyl liner pool is inground, it can be converted. But you'll probably have to remove all of the vinyl pool elements until you have reduced the pool to a big hole in the ground and then start from there. All it takes is time and money!
Hammer and chisel to scrape it off, an assortment of putty knives.
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