The drywall wasn't primed properly.
The sap in the wood will bleed through latex. It needs to be primed with an oil based primer such as Kilz.
Yes
Yes, you can.
In most cases yes. Primer is applied according to what it is going on, not what is going over it. - Latex / acrylic / water-based primers are good over drywall, stucco, brick, patches and repairs made with polyfil or other drywall patching compounds, paper, and many other porous materials. Once the primer is applied and dry any type of paint may be painted over it.
Latex Primer dries fairly quickly. It will depend on the humidity levels in the home and the surface its applied to. On new drywall which the surface is more porous and will absorb more primer vs previously painted. Usually you can apply a top coat in 2 - 4 hours. Rick The Renovator
The sap in the wood will bleed through latex. It needs to be primed with an oil based primer such as Kilz.
Yes
Only following primer.
Yes, you can.
In most cases yes. Primer is applied according to what it is going on, not what is going over it. - Latex / acrylic / water-based primers are good over drywall, stucco, brick, patches and repairs made with polyfil or other drywall patching compounds, paper, and many other porous materials. Once the primer is applied and dry any type of paint may be painted over it.
It's generally much better to use water base primer on drywall.
Latex Primer dries fairly quickly. It will depend on the humidity levels in the home and the surface its applied to. On new drywall which the surface is more porous and will absorb more primer vs previously painted. Usually you can apply a top coat in 2 - 4 hours. Rick The Renovator
For sealing drywall joints, the best type of caulk to use is a paintable acrylic latex caulk.
yes but not the other way around the latex passes moisture
Yes it can.
Hot water
No, you either need to really rough up the oil paint with fine sand paper, or put a base coat on before you paint with your Latex paint. If you don't your Latex paint won't adhere.