3D Background

[AshleyT]

Hey guys I will be attempting my first go at this once iv got enough polystyrene together was just wondering if this is the right stuff to cover it in? An is there anything else I would have to do to once I have done about 5 coats of it http/www.diy.com/nav/decor/decorating-supplies/fillers-putty/fillers/-specificproducttype-interior_fillers/Polycell-Quick-Set-Cement-Polyfilla-PC3650017-Grey-9254184?noCookies=false thanks in advance

 

[AshleyT]

Anyone ?

 

[RSVBiffer]

Bit late in replying to this, sorry, but I have just coated one with epoxy pond paint and then covered the surface in sand as soon as the paint had been applied.