Lime casein works well on porous surfaces , even outdoors , though it has a short shelf-life and must be used with pigments that are balanced against the binder 's low pH .
NOUN NOUN VERB ADV ADP ADJ NOUN , ADV ADV , SCONJ PRON VERB DET ADJ NOUN CCONJ AUX AUX VERB ADP NOUN DET AUX VERB ADP DET NOUN PART ADJ PROPN .