No you cant ,you should never ever put water base over anything except oil base primer and any other water base paints.If you put water base paint over anything that is oil based it will never ever stick it will peal.People will tell you you can do it but they are wrong its bad voodoo
How old is the water based paint? If it has been dried for a few years, you will probably be OK, but I would avoid it if you can.
You can also find a water based polyurethane to use. It is not as good as the oil based stuff, but you will not risk the incompatibility problems like with the other.
yes as long as oil poly has cured at least 5 days
Yes, that's common and should cause no problems.
Doubtful if it will stick properly.
Marine Paint
Not unless you prime it first.
Can you put stain in polyurethane to darken the color?
yes
Yes, both oil and water-based polyurethanes will adhere well to an item coated with acrylic paint. If it is a polyurethane paint, dull the surface prior to painting. If it is a clear. realize that that oil based polyurethane will impart an amber hue while a water based polyurethane is crystal clear and will not affect the color.
Yes, but only if the stain is a few years old and really dry. You have to wash the stain thoroughly to remove the chalked pigments and then prime it to seal the checks in the wood. One disadvantage of stain is that it will not keep the wood from checking as it dries. Either a latex of alkyd primer will work well. You can then paint it with your latex top coat.
I am doing that right now. It says on the can that it can be applied over an oil based stain...but the stain may continue to "amber" under the coating. I decided to go with the polyacrylic because a friend told me that polyurethane yellows over time. I don't know if that is true...but that is what I decided to do. So far, the acrylic is going over and drying over the oil based stain without any problems.
Can you put stain in polyurethane to darken the color?
You can apply "oil" based polyurethane over "oil" based enamel, you can also apply "water" based polyurethane over "water" based enamel, never mix the two, there's to much of a chance for problems.
yes
yes
Yes, both oil and water-based polyurethanes will adhere well to an item coated with acrylic paint. If it is a polyurethane paint, dull the surface prior to painting. If it is a clear. realize that that oil based polyurethane will impart an amber hue while a water based polyurethane is crystal clear and will not affect the color.
Yes, but only if the stain is a few years old and really dry. You have to wash the stain thoroughly to remove the chalked pigments and then prime it to seal the checks in the wood. One disadvantage of stain is that it will not keep the wood from checking as it dries. Either a latex of alkyd primer will work well. You can then paint it with your latex top coat.
I am doing that right now. It says on the can that it can be applied over an oil based stain...but the stain may continue to "amber" under the coating. I decided to go with the polyacrylic because a friend told me that polyurethane yellows over time. I don't know if that is true...but that is what I decided to do. So far, the acrylic is going over and drying over the oil based stain without any problems.
Yes you can if it is a solid stain. However, if you're using toners or semi-transparent stains, you'll want to remove all the water based product prior to applying the oil based stain, otherwise, it will appear blotchy if the water based stain is worn unevenly.
Yes, as long as the polyurethane is oil-based.
Yes, however clear polyurethane has a yellow cast that will affect the color of the paint. Most water based clears are crystal clear, very durable and can be used in place of an oil-based clear coating.
Yes, you can
Try using oxalic acid, also called wood bleach, on the water damaged area before attempting to stain the wood. If that removes the stain, sand the surface, use a wood conditioner or a clear stain as a first coat, then apply the colored stain. Once that's dry, apply a clear polyurethane for interior use, or a spar varnish for exterior use.