Experimented with piping bag and gesso while attempting to make resin castable ironwork. Too much spread after piped. Might try piping pollyfilla but that might be too thick and/or ruin piping bag. Other option is icing or piping gel? Tried the salt weathering technique on an Orcish sword. Worked ok except for some fogging of the floor wax ink wash l use. Hopefully further washes and matt varnishing will hide that.