Can you gloss paint over old gloss paint?

i am decorating the bathroom and i need to gloss paint the skirting boards. Do I need to do anything to the skirting boards first?Can you gloss paint over old gloss paint?
Lightly sand them first to rough the surface.You will get a better bond that way.Can you gloss paint over old gloss paint?
Rub down with glass paper so that the surface is no longer glossy. Apply one coat of white undercoat and when dry paint a coat of gloss. For a great finish rub this gloss coat down when dry and give a second coat of gloss. If you use one coat paint then still do a second coat after rubbing down the first coat. Leave for at least 2 days before using the bathroom so that the surface hardens.
You can gloss straight on gloss with just rubbing down the surface first, but it is poor painting practice. The new gloss needs an undercoat which is a softer paint and acts as a buffer for knocks and like an anti-slip mat between the hard shiny old and new gloss. Also if you only gloss on gloss the next time you come to paint and you try to rub it down it will probably peel and roll off. I would only do one gloss on an interior.
In short yes you can. Painting is all about preparation and with the right preparation you can definately paint gloss paint over gloss paint.





For a detailed guide as to painting over lots of different surfaces such as gloss paint, laminates, etc check out: http://www.servicecentral.com.au/resources/articles/Guide-to-Painting-Interior-Surfaces/23





Also, some other good home painting articles are:





1. Painting tips for DIY painting: http://www.servicecentral.com.au/resources/articles/Painting-Tips-for-DIY-Painting/1





2. 5 Things to check after painting: http://www.servicecentral.com.au/resources/articles/5-things-to-check-for-after-painting/2





Cheers





Danial
If they are in good condition you can apply gloss but you will have to give them a good sanding down first so that the new paint has a good key. Alternatively...You can give them a sanding and a coat of undercoat which will make it an easier to gloss onto....good luck Fred
You are supposed to be able to with the paint now. I find though that if the old paint is yellowing you have to give it 2 coats anyway. It never looks as well as if I give it an undercoat first.
to do a good job the answer is no rub the gloss work down and then use an undercoat then you can gloss the paintwork after the undercoat is dry


good luck
you can brush a coat of wil-bond on it...it eliminates the need for sanding and will help the top coat bond better...
the least you will have to do is rub it down with glass paper to give the paint something to key to
Depends how fussy you are.I always painted over the old gloss if it was sound
degrease it with a spirit ..then off you go you might as well....99%of world does