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How to clean copper blocks (externaly)?

post #1 of 18
Thread Starter 
Hey.
Just set up my loop again after moving home and noticed the edge of my Ultra block is looking dull and brown.
Whats the best way to clean the external copper sections of a block without risk of contamination to the seal or damage to the acrylic top?
post #2 of 18
1000+ grit sandpaper.
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In progress
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CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
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1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
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Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
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Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
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post #3 of 18
Ketchup (it is semi-solid and contains vinegar).
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post #4 of 18
Ketchup, lemon juice and salt, a pencil eraser works pretty well but will leave it dull looking...
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post #5 of 18
Thread Starter 
Thanks guys.
Anything less food oriented?
post #6 of 18
Never Dull
Mothers Mag Polish
    
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post #7 of 18
Quote:
Originally Posted by laurie View Post
Thanks guys.
Anything less food oriented?
Why does it matter?
Once again...
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Once again...
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Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
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post #8 of 18
Quote:
Originally Posted by laurie View Post
Thanks guys.
Anything less food oriented?
Quote:
Originally Posted by DuckieHo View Post
Why does it matter?
I guess he cant stomach the thought
    
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post #9 of 18
Quote:
Originally Posted by The Duke View Post
Never Dull
Mothers Mag Polish
i second that, i use plastic/glass polish or metal polish
    
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post #10 of 18
Thread Starter 
Quote:
Originally Posted by The Duke View Post
I guess he cant stomach the thought
I actually suffer from a phobia of food.
Im fine if its on a plate and I eat it quickly, if it stands for more than a couple of minuets I cant touch it.
Im strange I know
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