BMW K bikes (Bricks)

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Dai

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I repaired a broken seat hump today (one side was smashed off by Royal Mail). When cleaning the paintwork with acetone prior to gluing the strengthening pieces in, I was surprised to find blue paint appearing on the cleaning cloth. A bit of experimentation later revealed that if the surface has been treated (all the polished shiny bits), there's no problem. If the surface has been left unfinished (e.g. under the seat hump) then acetone lifts the paint. Anything to save a penny, eh, BMW?


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

charlie99

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bugga of a way to find out Dai

good luck mate


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

Dai

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It didn't do any real damage Charlie - it was just a bit of an unwelcome surprise. It looks like BMW really went to town on the penny-pinching in the out-of-sight places. Especially the back end.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

pprince

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Oh yes, acetone is a solvent. It is also used as a degreaser prior to repainting.


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Paul
1984 Honda V65 Magna
1985 BMW K100RT
2011 BMW K1600GTL (gone)
2018 BMW K1600GTL
    

RicK G

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@Dai wrote:I repaired a broken seat hump today (one side was smashed off by Royal Mail). When cleaning the paintwork with acetone prior to gluing the strengthening pieces in, I was surprised to find blue paint appearing on the cleaning cloth. A bit of experimentation later revealed that if the surface has been treated (all the polished shiny bits), there's no problem. If the surface has been left unfinished (e.g. under the seat hump) then acetone lifts the paint. Anything to save a penny, eh, BMW?
Gees I wouldn't touch any paint with acetone regardless of what it had been treated with, that's asking for trouble.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

73MOH

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acetone is a very effective paint remover.... and is often sold as nail polish remover.
get yourself some wax and grease remover..... prepsol


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Paul
1986 K100 RS
1997 K1100LT
2005 KTM990sd
    

Point-Seven-five

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Rubbing alcohol (isopropyl) from the drug store works great and doesn't mess up paint. It's cheap too. Get 70% or stronger.


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

Dai

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I'm going back to the eight litres of brake cleaner that's stored next to the acetone. The acetone is now reserved for degreasing metals only. And cleaning sh!te off my workbench.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

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