You should wait about 2 weeks before using a wheeled vac head OR follow the advice of the installer. He is the last authority on that subject.
Drain pool and clean with muriatic acid
The plaster would not adhere to the liner. k
NO NO !! You must remove the vinyl completely and then check what substrate you have. Concrete plaster or brick will be fine.
Why in the world would you want to paint a marbelite or plaster pool?
Long enough to clean the pool.
20 year old marbelite pool How to refinish, paint or what Yes you can, There are many epoxy paints especially formulated for this purpose. See the link for complete instructions and video.
No, you do not have to. You just have to be careful not to swim into them.
Probably about same length so you can vacuum all sides.
Any pool vacuum can, including the Polaris.
How do I vacuum an above ground doughboy pool?
A vacuum head that has a brush on the bottom - no wheels.
The key to a clean and enjoyable pool is constant maintenance. Do not wait until the pool reaches a state where you must vacuum. Develop a regular schedule that will continually keep your pool sparkling. Pools require a lot of work, however if you want the enjoyment for yourself and others, you must constantly work at it.