You could use stone chip protect paint.
It tends to have the ripple orange peel effect / finish and then you can paint over it in the colour of your choice.
Or
Use some Rustoleum Combicolour - Roller it on, and again you should get a textured finish.
Or
for a really smart look, try covering the dash in a vynide / pvc / leatherette fabric.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished