Can chalk paint be applied over gloss enamel paint?

yes you have to use primer first

Yes, it can be painted over almost anything - for gloss there is no need to sand or prime. For old varnish - I always prime so that it does not bleed through. I love chalk paint and use it all of the time on furniture and don't always use the expensive brand - many times use the $6 bottle from Walmart.

yes you can use chalk paint over enamel...just remember that you will need a sealant...either wax or polycrylic

We can’t find the color of chalk paint we want so can we use an enamel for under neath then use a chalk paint over to sand down until we get the effect we want?

That makes no sense! Get some kilz.

Hi Susan, unfortunately, I wouldn't advise putting chalk paint over enamel unless you prep and prime the surface properly. Enamel paint is usually oil-based while chalk paint is water-based and won't adhere properly.

I have a large (see pix), badly painted wardrobe that I want to chalk paint. As you can see it is a high gloss black and when I tried hand sanding parts of it just started to peel off.

I am willing to continue with hand sanding to the point where it's dulled up, giving more attention to where it has peeled to smooth out the edges.

Can I just continue with the hand sanding without taking the black paint completely off and then apply the chalk paint directly. Do I need to prime this and if so, with what???

Yes but you need a good primer in order to give the paint something to stick to. That means before applying the primer you need to sand this. Be patient and good luck!