I would expect to pay around $0.65/LF for a sizable job, or about a $200 minimum, whichever is greater.
What they call "oil base paint" is really called "alkyd base paint." So yes, you can do that.
Yes, you can.
yes
yes. However, you cannot use an oil base paint over a latex primer. If you change your mind on the paint, you must strip the paint before you use an oil based paint on the primer.
If the base coat used in your project is water base then yes, you bet you can. If there is any chance that the base coat used was an oil base paint then you cannot paint directly over it. The acrylic enamel will not adhere to the oil base paint and will begin to peel off as soon as it is dry. In which case a coat of primer is in order.
What they call "oil base paint" is really called "alkyd base paint." So yes, you can do that.
You can paint latex over oil, we do it all the time. The oil base was not prepped correctly. The paint needs a "tooth" to hold on. You need to sand all surfaces to a solid surface (oil paint, wood etc...) then clean it well with a wet rag using a solution of water and TSP. Let it dry. You now have a solid surface with a slight roughness to it. You can now paint.
Don't mix them, your inviting trouble
Yes, you can. You can always paint over with same paint.
Yes, you can.
It's generally much better to use water base primer on drywall.
Yes. Clean and degloss the oil based paint, apply an oil based primer, then apply the water based paint.
Yes, you can
can i use water base paint over oil base paint
yes
Yes, you can, the base is similar.
Yes, you can,