You could try spraying straight bleach from a spray bottle, and then rinse with either reverse-osmosis or distilled water.
There are a number of ways you could remove stains from worms on a vinyl liner. You could use cleaners.
If you have water behind your vinyl in ground pool liner, you should first lower the water in the pool to normal levels if it is over-filled. Make sure that the vacuum pipe is clear, unclog it if it is not. Once it is unblocked let the water from behind the liner flow out.
To clean algae from a vinyl pool liner after it has become crystallized, use a solution of bleach and water with a scrub brush. One cup of bleach for every 5 gallons of water should be enough to clean the vinyl liner. Rinse well, then let dry before storing the pool.
Try algecide gel and a soft sponge. You might also try Vitamin C tablets in a sock.
no on paint! You will need to replace the liner.
No
Yes, replace the liner. Nothing can put the color back into plastic or vinyl or glass or steel.
Vinyl Liner
One pound of ascorbic acid per 10,000 gallons.
High concentrations of chlorine can and will destroy a vinyl liner.
Yes
i stored a vinyl hot tub in storage and now it has yellow and black mold stains on it. how do i remove the stains and smell?