Very Smooth External Render

[Laloop2000]

I am painting a very large mural on an exterior wall. The wall is render with a semi rough finish, pebble dash, (I think) I want a smooth surface to paint on like an interior plaster, can any body recommend a product that I can plaster over the top..

Thanks

 

[noseall]

It is possible to render on top of pebble dash provided the latter is sound and the loose stuff brushed off. However, the best finish you are likely to achieve is probably a sponge finish that has maybe a floor trowel passed over it very last thing.

I,m pretty sure that a sponge finish would do for a mural though. You may need to do a bit of prep work first though.