Yes, I do and its well covered by topics on this site.
Are you using lime / cement? That seems unusual.
Internal plastering
What is the mix for internal lime plaster?
The mix can vary depending on the hardness and the type of finish required; the richest mix being three parts of lime to one of fine sharp sand,
and the leanest mix being one part of lime to three parts of sand.
Internal lime plasters
External plastering
Unlike gypsum or clay plaster, lime plaster is sufficiently durable and resistant to the elements to be used for exterior plastering.
From;
external lime renders/ plasters
A typical mix using for the first two coats using either lime putty or hydraulic lime is, 2 lime: 5 sand, and the finishing coat 1 lime: 3 sand.
Drying times for undercoat should be at least 2 days in summer and 7 in winter
