On 17/03/2020 21:44, Mr Mark A Colfer wrote:
Have deeper than usual MDF internal window cill inside which was
previously (
badly) painted in old fashioned oil based gloss.Â* Had thought about over
laying a pvc cill but they're not made deep enough.Â* So question is
would it
he possible to cover this in a brilliant white pourble epoxy resin and
if so
can somebody point me in the direction of a supplier..

Why not strip the paint (hot air gun or Nitromors) and repaint it?

BTW many people (including me) prefer oil-based paint to acrylics,
especially on something like a window sill/cill.