Yes.
can you stain over kool deck pool paint
Can you put stain in polyurethane to darken the color?
The best way to stain cabinets is to apply the stain over shellac then shellac over the stain last step Zip Guard over that to protect surface from moisture damage
Yes, you can use a roller to apply stain to a deck. It can be an efficient and effective method for larger surface areas. Just make sure to evenly spread the stain and work in small sections to avoid overlap marks.
You can try paint remover or paint the desk color over it.
You should apply at least two coats of clear finish over a stain. Be sure to put thin coats of the clear finish on, you do not want it to be too thick.
Yes : If conditions are right. take some water and put it on the surface if it beads you can not apply another stain. it won't be able to absorb if it does absorb the water your fine but should use a similar color
CAN you? Yes, however you shouldn't unless it is well shielded from the sun's UV rays otherwise, it will quickly fade. Also, most interior stain has no mildewcides added so you'd need to apply an exterior clear over the top to slow mildew growth.
You should never paint a deck, the paint will peel (unless you live in a very arid climate I guess. The deck may be stained, you can put either oil or latex stain over old oil stain.
Yes, you could stain vinyl, but I wouldn't. Actually, you could stain nearly anything it just wouldn't always come out the way you hoped. Vinyl would not take a semi-transparent stain the same way wood does. There are no pores or grain patterns to absorb the stain. The results would be a little odd looking. Every nick, scratch, blemish or other imperfection would stand out 100 fold. Your best bet, if you just want to change the color of your deck, would be to apply a solid, non transparent exterior stain or a quality exterior paint. The trick in doing either of those is in the prep. Because the vinyl will oxidize over time it must be removed or sealed out completely before applying a finish. If you take your finger and rub it on an area that gets a lot of sun, you will see the oxidization on your finger. First thing to do is power wash the deck. After it dries you apply a coat of exterior primer/sealer and let that dry. Then you can apply the color of paint you desire and you shouldn't have any problems. Remember, if you want your new deck color to last don't take short cuts in the preparation. Good luck!
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.