Windows are one of the easiest things from which to remove paint, regardless of type of paint. Any scraper or razor knife will do the trick with little to no major effort.
No. You must sand the gloss of and them prime and then paint. Semi and High Gloss is only meant for wood not dry wall. Its the worst idea ever to put a gloss on dry wall. Any paint with an Enamel is just as washable.
I'm assuming your talking about house type paint and not something high end like car paint. If so, the answer is yes, but you must de-gloss it first to open pores in the old paint and give the new paint something to grip on too. To de-gloss, you can use sandpaper (150 grit and above is better) to "scuff" sand (just scratching the surface a bit, not really sanding anything off of the wall), or use a commercial de-glosser (such as krud kutter's "gloss off" etc...) which in most cases, you have to rinse off before repainting, but does do a more through job. If the old paint is really hard and shiny, you might have to de-gloss AND use an adhesive primer (also called "bonding" primer) first to insure your new paint sticks and doesn't peel.
the high gloss acrylic would bead up and not give you an even application over the oil based
It is better to use a paint that absorbs light. A flat preferably. A gloss paint will bounce light off of it's surface causing a distraction when viewing a large screen. Most theatre's use Cloth of some kind or curtains as material absorbs light.
Matte paint should really only be used on low-traffic areas in your home. Semi-gloss should be used in bathrooms, kitchens or high traffic areas where you are going to want to wash down the walls. I don't like matte paint because when my walls get a skuff on them, I can't wipe it off without taking off the paint. On the other hand, when there is a skuff on the semi-gloss walls, it comes right off and the paint stays on.
If you have the satin, you can add flat paint and take some of the sheen off. This would have to be done before application. It will never be a true flat though.
Use Tremclad spray, mask off the window part.
well you should not go in the bathroom it should be ok if your lucky it will peel off, mine did. If it's supposed to be on the outside of the house wouldn't that mean that it is strong paint? You might be better off with what you did.
You didn't mention whether you were using latex or oil based primer and paint, but generally the point of using primer is so that you can paint over it with any form of wall paint. Just read the label on your primer can to make sure it is compatible. On the other hand, if you wanted to paint the primer over the satin gloss, you need to sand the surface lightly to remove the sheen of the paint and provide a suitable surface for the primer to adhere properly.
It depends on the type and sheen of the paint. If its a flat latex then your best bet is to Kiltz the area then repaint. A semi to hi-gloss should safely clean with a standard detergent
Dampen a cloth with lemon oil and rub the gloss off.
Most paint brands are essentially the same, you will pay more for name brand paints, but the off-brands will do the same job. Aside from paint brands, you want to buy interior paint for the inside of your home. There are several finishes available in paint such as glossy, semi-gloss, and flat. Usually the best paint is a semi-gloss as it can be wiped with a damp cloth for cleaning. Most home improvement stores carry paint as well as your local hardware store and definitely Wal-Mart.