took a bit of searching to discover that POP is probably PoP - plaster of Paris and yes plaster of Paris will slow way down if it is not exposed to air - in fact, if you are building up plaster ("the way you would icing") to do sculpting, which is rather uncommon, you keep the set plaster damp in order to add more unset plaster or you have to wet the area where you will be adding plaster "mud"
1	took	take	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	3	det	3:det	_
3	bit	bit	NOUN	NN	Number=Sing	1	obj	1:obj	_
4	of	of	ADP	IN	_	5	case	5:case	_
5	searching	searching	NOUN	NN	Number=Sing	3	nmod	3:nmod:of	_
6	to	to	PART	TO	_	7	mark	7:mark	_
7	discover	discover	VERB	VB	VerbForm=Inf	1	csubj	1:csubj	_
8	that	that	SCONJ	IN	_	12	mark	12:mark	_
9	POP	pop	NOUN	NN	Number=Sing	12	nsubj	12:nsubj	_
10	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	12:cop	_
11	probably	probably	ADV	RB	_	12	advmod	12:advmod	_
12	PoP	pop	NOUN	NN	Number=Sing	7	ccomp	7:ccomp	_
13	-	-	PUNCT	,	_	12	punct	12:punct	_
14	plaster	plaster	NOUN	NN	Number=Sing	12	appos	12:appos	_
15	of	of	ADP	IN	_	16	case	16:case	_
16	Paris	Paris	PROPN	NNP	Number=Sing	14	nmod	14:nmod:of	_
17	and	and	CCONJ	CC	_	23	cc	23:cc	_
18	yes	yes	INTJ	UH	_	23	discourse	23:discourse	_
19	plaster	plaster	NOUN	NN	Number=Sing	23	nsubj	23:nsubj	_
20	of	of	ADP	IN	_	21	case	21:case	_
21	Paris	Paris	PROPN	NNP	Number=Sing	19	nmod	19:nmod:of	_
22	will	will	AUX	MD	VerbForm=Fin	23	aux	23:aux	_
23	slow	slow	VERB	VB	VerbForm=Inf	1	conj	1:conj:and	_
24	way	way	ADV	RB	_	25	advmod	25:advmod	_
25	down	down	ADV	RB	_	23	advmod	23:advmod	_
26	if	if	SCONJ	IN	_	30	mark	30:mark	_
27	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	30	nsubj:pass	30:nsubj:pass	_
28	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	30	aux:pass	30:aux:pass	_
29	not	not	PART	RB	_	30	advmod	30:advmod	_
30	exposed	expose	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	23	advcl	23:advcl:if	_
31	to	to	ADP	IN	_	32	case	32:case	_
32	air	air	NOUN	NN	Number=Sing	30	obl	30:obl:to	_
33	-	-	PUNCT	,	_	1	punct	1:punct	_
34	in	in	ADP	IN	_	35	case	35:case	_
35	fact	fact	NOUN	NN	Number=Sing	62	obl	62:obl:in	SpaceAfter=No
36	,	,	PUNCT	,	_	62	punct	62:punct	_
37	if	if	SCONJ	IN	_	40	mark	40:mark	_
38	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	40	nsubj	40:nsubj	_
39	are	be	AUX	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	40	aux	40:aux	_
40	building	build	VERB	VBG	Tense=Pres|VerbForm=Part	62	advcl	59:csubj|62:advcl:if	_
41	up	up	ADP	RP	_	40	compound:prt	40:compound:prt	_
42	plaster	plaster	NOUN	NN	Number=Sing	40	obj	40:obj	_
43	(	(	PUNCT	-LRB-	_	46	punct	46:punct	SpaceAfter=No
44	"	"	PUNCT	``	_	46	punct	46:punct	SpaceAfter=No
45	the	the	DET	DT	Definite=Def|PronType=Art	46	det	46:det	_
46	way	way	NOUN	NN	Number=Sing	40	obl	40:obl	_
47	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	49	nsubj	49:nsubj	_
48	would	would	AUX	MD	VerbForm=Fin	49	aux	49:aux	_
49	icing	icing	NOUN	NN	Number=Sing	46	acl:relcl	46:acl:relcl	SpaceAfter=No
50	"	"	PUNCT	''	_	46	punct	46:punct	SpaceAfter=No
51	)	)	PUNCT	-RRB-	_	46	punct	46:punct	_
52	to	to	PART	TO	_	53	mark	53:mark	_
53	do	do	VERB	VB	VerbForm=Inf	40	advcl	40:advcl:to	_
54	sculpting	sculpting	NOUN	NN	Number=Sing	53	obj	53:obj	SpaceAfter=No
55	,	,	PUNCT	,	_	53	punct	53:punct	_
56	which	which	PRON	WDT	PronType=Rel	59	nsubj	40:ref	_
57	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	59	cop	59:cop	_
58	rather	rather	ADV	RB	_	59	advmod	59:advmod	_
59	uncommon	uncommon	ADJ	JJ	Degree=Pos	40	advcl:relcl	40:advcl:relcl	SpaceAfter=No
60	,	,	PUNCT	,	_	62	punct	62:punct	_
61	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	62	nsubj	62:nsubj	_
62	keep	keep	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	1	parataxis	1:parataxis	_
63	the	the	DET	DT	Definite=Def|PronType=Art	65	det	65:det	_
64	set	set	ADJ	JJ	Degree=Pos	65	amod	65:amod	_
65	plaster	plaster	NOUN	NN	Number=Sing	62	obj	62:obj|66:nsubj:xsubj	_
66	damp	damp	ADJ	JJ	Degree=Pos	62	xcomp	62:xcomp	_
67	in	in	ADP	IN	_	70	mark	70:mark	_
68	order	order	NOUN	NN	Number=Sing	67	fixed	67:fixed	_
69	to	to	PART	TO	_	70	mark	70:mark	_
70	add	add	VERB	VB	VerbForm=Inf	62	advcl	62:advcl:to	_
71	more	more	ADJ	JJR	Degree=Cmp	73	amod	73:amod	_
72	unset	unset	ADJ	JJ	Degree=Pos	73	amod	73:amod	_
73	plaster	plaster	NOUN	NN	Number=Sing	70	obj	70:obj	_
74	or	or	CCONJ	CC	_	76	cc	76:cc	_
75	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	76	nsubj	76:nsubj|78:nsubj:xsubj	_
76	have	have	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	62	conj	62:conj:or	_
77	to	to	PART	TO	_	78	mark	78:mark	_
78	wet	wet	VERB	VB	VerbForm=Inf	76	xcomp	76:xcomp	_
79	the	the	DET	DT	Definite=Def|PronType=Art	80	det	80:det	_
80	area	area	NOUN	NN	Number=Sing	78	obj	78:obj	_
81	where	where	ADV	WRB	PronType=Rel	85	advmod	85:advmod	_
82	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	85	nsubj	85:nsubj	_
83	will	will	AUX	MD	VerbForm=Fin	85	aux	85:aux	_
84	be	be	AUX	VB	VerbForm=Inf	85	aux	85:aux	_
85	adding	add	VERB	VBG	Tense=Pres|VerbForm=Part	80	acl:relcl	80:acl:relcl	_
86	plaster	plaster	NOUN	NN	Number=Sing	88	compound	88:compound	_
87	"	"	PUNCT	``	_	88	punct	88:punct	SpaceAfter=No
88	mud	mud	NOUN	NN	Number=Sing	85	obj	85:obj	SpaceAfter=No
89	"	"	PUNCT	''	_	88	punct	88:punct	_
