There are a few different methods to determine whether the paint is oil-based or latex-based. Here are two common methods: 1. Rubbing alcohol test: Put a small amount of rubbing alcohol on a rag and rub it on the painted surface. If the paint comes off onto the rag, it is latex-based. If not, it is likely oil-based. 2. Ammonia test: Mix equal parts of water and ammonia, and apply the mixture to the painted surface. If the paint softens and begins to come off, it is likely latex-based. If the paint remains unchanged, it is probably oil-based. It's important to know the type of paint before applying a new coat or making any repairs, as oil-based and latex-based paints require different preparation and application techniques.

The duration of a typical paint job can vary depending on the size and complexity of the project. However, for a standard-sized room, it usually takes around 2 to 3 days to complete the entire painting process, including preparation, priming, painting, and touch-ups.

It's generally not recommended to paint a wet surface, as moisture can affect the adhesion and durability of the paint. The surface should be completely dry and free of any moisture or humidity before painting to ensure the best possible results.