I don't catch the Vexing Shusher SB too, but i guess he's just a counterspell with legs.
I played the deck for a couple matches on mws and found it good and funny. But are 4 PoP needed? People is already fetching basics against us due to Magus of the Bloodmoon. In the games I had (Ichorid and Atog) they didn't do much, with 1 time 4 dmg, 2 times 2 dmg, and 2 times with the opponent sitting on only artifacts/basics.

I don't understand why all those 1ofs without tutoring power. Is there something i'm missing?

5. Yeah, but just as a 1-of if the only upside is that it can be tutored.
7. Oh My God. I forgot how busted Vintage is! Even a monored deck have a draw 7.. Definetly in.
@Welder. I don't know if the deck has the right amount of artifacts to get it going. However, you just need to protect painter, grindstone is just a plus, so i guess blasts are ok at doing it unless there's shattering spree or krosan grip involved.

The short answer is: you have to lucksack into it.
The deck however needs painter A LOT more than Grindstone, that's why in this deck Recruiter a better tutor than Trinket. Grindstone is just the oops I win.
The beatdown plan is the usual path to the win, it just happens that sometimes you have a turn 2/3 win.

I'm not a skilled vintage player at all. My format is legacy, but I heard painter is doing quite well in its blue form with 8 blasts MD.
A new deck is evolving in legacy and I'd like to see if it can be competitive in Vintage too. Many of its card choices are similar to what other TMWA run.
Here's a list of Legacy's Imperial Painter:

http://mtgthesource.com/forums/showthread.php?t=10090
[4x] Painter's Servant
[4x] Grindstone
[4x] Simian Spirit Guide
[4x] Magus of the Moon
[4x] Imperial Recruiter
[4x] Lightning Bolt
[4x] Pyroblast
[4x] Red Elemental Blast
[3x] Jaya Ballard, Task Mage
[2x] Active Volcano
[1x] Vexing Shusher
[4x] Chrome Mox
[4x] Ancient Tomb
[4x] City of Traitors
[10x] Mountain

Here's the list I tweaked in 5 minutes to be played in vintage:

// Lands
    11 [UG] Mountain
    4  Ancient Tomb
    2  City of Traitors

// Creatures
    4  Simian Spirit Guide
    4  Imperial Recruiter
    4  Magus of the Moon
    4  Painter's Servant
    3  Jaya Ballard, Task Mage
    1  Vexing Shusher
    1  Gorilla Shaman
    1  Stingscourger

// Spells
    3  Dead/Gone
    4  Pyroblast
    4  Red Elemental Blast
    4  Grindstone
    1  Mana Crypt
    1  Sol Ring
    1  Black Lotus
    1  Mox Ruby
    1  Chrome Mox
    1  Trinisphere

// Sideboard
SB: 3  Pithing Needle
SB: 3  Spellshock
SB: 1  Gaea's Blessing
SB: 4  Shattering Spree
SB: 4  Tormod's Crypt

Card choices:
Manabase:
I suck at making manabases. I just took the original list -some lands -3chrome moxes +some broken on-color artifact acceleration.

Beaters:
Magus of the moon: I see many people running it so I guess it's quite good in the format. Being able to power it out on turn 1 on the play is great.
Imperial recruiter: The base of the deck. It can often be played as a turn 1 spell thanks to the 2 mana lands and SSG. It tutors for every creature in the deck, finding silver bullets as well as the core of the combo (Painter).
Painter's servant: Allows you to play with 8 1cc vindicate+counterspells and it's an oops I win in case you draw Grindstone.
Jaya Ballard: a beating body. It gets rid of opposing pesky creatures such as Confidants, Juggernauts, Welders and the like. It's a "Vindicate" machine with Painter out. Unfortunately it's legendary, and its CC is not that easy on the manabase.
Vexing Shusher: don't know if this can be useful in Vintage. It's mostly used to play the combo unharmed by counterbalance in legacy. Probably a weak slot.
Gorilla shaman: A silver bullet against artifact mana when you have a Blood Moon effect out.
Stingscourger: A tutorable way out of Colossus and other pesky big creatures.
SSG: it accelerates and beats. It allows silly things like countering turn 1 on the draw and powering turn 1 Magus, painter or recruiter.

Spells:
Trinisphere: Many of our spells are 3cc so i guess it doesn't harm us as it does with the opponent. Don't know if it warrants the slot though.
Grindstone: D'oh!
8 Blasts: you ogt 4 painters and 4 tutors to it. Vintage is a blue based format also.
3 Dead/Gone: Additional answers to tinker and to pesky lil' critters.

Side:
Spellshock: Much better than Pillar in this deck due to the CC. It's also worth noting that while we don't have spells with CC>3, tendrils does.
Gaea's blessing: Against opposing painters/ brainfreezes (do people still play Freeze after the bannings?)
Tormod's Crypt: Yeah, people wants to use the graveyard.
Pithing Needle: additional hate Against Ichorid.
Shattering Spree: Stax and Mud variants.

Testing:
As I said I'm just a bad vintage player: I don't know the format well and I'm not used in playing with busted cards. I did a couple of matches on MWS just to see if the deck is that bad.

2-1 vs Grim Long.
G1. He comboes turn one on the play. D'oh!
G2. I play a first turn Magus. He plays an underground Sea and a Green Mox. I play a Painter. He plays a fetch. I play a spellshock and it's GG short after.
G3. He fetches for basic. I play Mox, Tomb, Painter. I counter something on his turn. I play a grindstone and win.

2-0 vs Control Slaver.
G1. I play a painter on turn one. He doesn't have a force. I have 3 blasts in hand and gain control of the match easily.
G2. Painter on turn 1 gets forced. Recruiter on turn 2, he drains, i REB. Tutor for painter. Play painter on turn 3. He plays slaver with the help of Lotus. I combo on turn 4.

2-1 Ichorid.
G1. He starts with a bazaar. I play a turn 2 Magus of the moon but it's already too late.
G2. I start with a Needle+crypt. On turn 2 i play a painter.
G3. He starts with unmask and i reveal a hand of Magus, Magus, Needle, tomb, SSG, Lotus, Painter. I can't lose that one.

EDIT: note that the field was random MWS players. So it's worth nothing.

Unfortunately i had no chance to play against stax.
What do you guys think about the deck?

Weren't the confidants good in the Sui matchup?
When did you board the ETWs in?

It's a pleasure to see IGG doing well again, even with all the new combos and loads of AggroControl around
Congrats for your finish!