Yes you can, although it will adhere much better if you spray a primer first.
Tremclad makes it in regular paint or spray. The spray is better, especially if sprayed over a flat white primer they also make.
Yes, enamel paint will go over flat paint.
Can I paint semi gloss over flat paint? Thanks!Barbara Phillips
Yes, but first lightly sand the surface to remove any gloss.
If I wanted any clearcoat to make a paint shinier, I'd use a Krylon spray gloss varnish. Most oil based gloss paints are so hard and shiny they really don't need a clearcoat.
Yes. But you can't do the reverse. So if your primer is lacquer-based you can spray an over-coat of enamel on the top.
no
High gloss Exterior Oil-Based Gloss Enamel over Quality Primer will give the best results on a cornice.
It won't adhere properly if you do. You'll find it peeling of almost as soon as it dries.
Yes. You'll want to ensure that the surface is clean and gloss free prior to applying the flat topcoat.
No. You must sand the gloss of and them prime and then paint. Semi and High Gloss is only meant for wood not dry wall. Its the worst idea ever to put a gloss on dry wall. Any paint with an Enamel is just as washable.
Yes.