You have to use a good primer first.
painting and straining
I'm not too sure, but it probably says on the can. I have used both latex and oil based paint; and I can't stand oil-based paint. It's more difficult to work with than with latex paint. Painting with latex is fun whereas painting with oil-based paint was a total pain in the ......... The fumes are so strong you can't use it indoors unless the area is well ventilated. The paint drips off the brush before you get it to the wall because the the paint is oily. Imagine painting with motor oil. It's almost that bad. I'll never use oil based paint again. its nothing like painting with motor oil, more like molasses I have been painting house's/ skyscrapers/oil rigs for over 25 years. & yes you can use oil base paint over latex, 1st you scruff the existing paint with sand paper, then dust, put 1 coat of primer(Kilz primer is the best I have found to use) over latex paint a lite coat will do. let dry & now your free to start painting. Dan
You cannot paint over slightly tacky latex paint with a water based polycyclic finish. You should always wait until the latex paint is thoroughly dry before painting over it.
Latex paint does on occasion, but based on a lot of outdoor painting I've done, it's a minor problem with latex. It can be a notable problem with oil based paint, however, as the linseed oil smell is attractive to many insects.
As long as you sand & prime first, in most cases just latex primer applied before painting with the latex paint. If the old paint is really old, be careful about sanding, it may contain lead.
yes
There are some water based coatings that will adhere to an oil based surface without using a primer; however, an oil or acrylic-based primer, used as a bridge, will allow you to paint latex over an oil-base paint trouble free.
Names of products in paint are often changing. However, most latex paint is still water based.
If you mean latex paint, none. Latex is a water based paint and has no toxic fumes.
You can always paint latex ( water based )over an oil based paint as the latex just dries on the surface. However don't paint an oil based over a latex paint. Oil based paints need to absorb into the wood or other surfaces or it will just dry and flake off. For more information on the differences and when or not to use a latex or oil paint please see the following article. . http://www.ehow.com/how_4713170_between-latex-oil-base-paint.html
yes but you cannot put latex on top of oil based surfaces You actually are NOT advised to put oil over latex surfaces, which is why you're supposed to prime will an oil-based (alkyd) primer. Latex and Polyurethane should always have a layer of oil-base beneath it.
You can paint over latex paint with either an oil or water based enamel paint as long as the surface is dull, clean and rust free. Any bare metal will need to be primed with a primer, either oil based or 100% acrylic Direct-to-metal, prior to top-coating.