Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Page 1 of 2 12 LastLast
Results 1 to 15 of 19
  1. #1
    Join Date
    Dec 2007
    Location
    Melbourne
    Posts
    1,628

    Default Where the Giant left his Coffee Cup

    Some giant left coffee cup rings all over my jointer!!!

    Any ideas of how to remove them if possible, without regrinding the entire surface? I'd like to preserve the original planer marks in the table.

    It's a 1912 12" Jointer by the Crescent Manufacturing Co USA.





    …..Live a Quiet Life & Work with your Hands

  2. #2
    Join Date
    Dec 2007
    Location
    Melbourne
    Posts
    1,628

    Default

    I couldn't help my self....scraper & wire brushing followed by a scotchbrite pad.



    Don't know what left those rings but their there for good it looks. It's almost like it has been etched or affected the cast iron in some way.
    …..Live a Quiet Life & Work with your Hands

  3. #3
    Join Date
    Dec 2010
    Location
    Melbourne
    Age
    79
    Posts
    31

    Default

    I agee with you leaving the original marks,wilh the holes as they are will that affect the cut quality?
    It could be a challenge to fill the holes so the repair does not look worse that just a bit of old age.
    The one you cleaned up does't look too bad.
    Good luck

  4. #4
    Join Date
    Dec 2007
    Location
    Melbourne
    Posts
    1,628

    Default

    Would a 4lt paint tin possibly cause some sort of galvanic reaction between the tin and the cast iron?? The ring left a mark in the cast surface not just on it.
    …..Live a Quiet Life & Work with your Hands

  5. #5
    Join Date
    Jan 2011
    Location
    Far West Wimmera
    Age
    63
    Posts
    4,049

    Default

    Quote Originally Posted by DSEL74 View Post
    Would a 4lt paint tin possibly cause some sort of galvanic reaction between the tin and the cast iron?? The ring left a mark in the cast surface not just on it.
    It could have been caused by leaks from anything in a can. I don't think it would be caused by the tin. Galvanic Corrosion occurs between different metals. I think it is most likely from the contents of a tin.

    Can you feel the marks? It has certainly come up better. I don't think coffee would do that.

    Dean
    Last edited by Oldneweng; 21st Jan 2015 at 05:45 PM. Reason: making sense

  6. #6
    Join Date
    Dec 2007
    Location
    Melbourne
    Posts
    1,628

    Default

    There was reside on the top orginally but that scrapped off, what is left is smooth or so to the touch. It's almost like the metal is bleached.
    …..Live a Quiet Life & Work with your Hands

  7. #7
    Join Date
    Jan 2011
    Location
    Far West Wimmera
    Age
    63
    Posts
    4,049

    Default

    Quote Originally Posted by DSEL74 View Post
    There was reside on the top orginally but that scrapped off, what is left is smooth or so to the touch. It's almost like the metal is bleached.
    Just a bit of character then. That is good.

    Dean

  8. #8
    Join Date
    Aug 2010
    Location
    ACT
    Age
    84
    Posts
    268

    Default

    Hi,
    A galvanized bucket or watering can could give you the different metals.
    Regards
    Hugh

    Enough is enough, more than enough is too much.

  9. #9
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,540

    Default

    Quote Originally Posted by DSEL74 View Post
    There was reside on the top orginally but that scrapped off, what is left is smooth or so to the touch. It's almost like the metal is bleached.
    It may be the stuff under the residue has not oxidised as much as the surrounding metal. Now that it is clean it may be worth just leaving it for a few months and see if it darkens up naturally.

    Michael

  10. #10
    Join Date
    May 2008
    Location
    BELL POST HILL, 3215
    Age
    87
    Posts
    93

    Default The marks.

    Hi DSEL74,
    I wood use some good 240 Grit Sandpaper around a wooden Block, with say a bit of Kero, but to make sure you went Length Ways & not across the bed.
    Sandpaper never hurt any Steel, so it may work.

    Gee I can hear the grumbles from here.
    Regards,
    issatree.
    Have Lathe, Wood Travel.

  11. #11
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Personally I would leave it but if you are determined you might give this a go.

    Clean both tables as throughly, kero then metho, to get the oil off and then paint the tables with a very thin coating of dilute vinegar. I would be prepared to use dilute HCl as this will speed things up but I wouldn't. recommend others do this. Plain water would also work but it would be slower.

    Watch it carefully Once it gets a thin even orange patina all over it I would then remove the rust with steel wool and kero.

    This will generate a bright grey finish but it will eventually even up the oxidation across the table and it won't remove the milling marks. It might need to be done a couple of times to get rid of the marks.

    Maybe practice on a bit of cast iron first, maybe try water first..

    This is the 16" jointer at the milling yard when I first got it.
    It looks way worse that it as as all the milling marks were still clearly visible on the tables
    All I did with this was use a wire brush on an angle grinder and while it gave a swirling polished finish on it it did not remove the milling marks on the table.
    Then I gave it a good coating of trad wax.


    Sorry no close ups - this is the closest photo I have after being de-rusted.


    And here is the all ally guard I made for it from an auto door closer - this works a treat.
    The oregon guard that it came with is next to it.


    Im going to have to repeat the whole derusting process because it was left outside for a few months during the big milling yard move of 2013!
    Attached Images Attached Images

  12. #12
    Join Date
    Dec 2007
    Location
    Melbourne
    Posts
    1,628

    Default

    Bob, That sounds like going three steps backwards to come one forward… It bugs me now probably because it is new and in 6mths I'll never even notice it. Unless there is a relatively quick and easy fix, probably best to leave it alone.

    How many blades in your cutter head??

    This machine was supposed to have a a very well regarded 4 blade round safety head for some reason it has been changed out for a two blade head which I'm quite disappointed to find. Again not some thing I going to have to live with as I can't afford to change it. Maybe one day those shelix heads will become cheap.
    …..Live a Quiet Life & Work with your Hands

  13. #13
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Quote Originally Posted by DSEL74 View Post
    Bob, That sounds like going three steps backwards to come one forward…
    Correct. This is also how old school metal bluing works - lightly rust it, convert red to black oxide and wire brush back the residue, repeat multiple times. After a couple of repeats the shine becomes a matt grey which gets darker and darker until it becomes black.


    It bugs me now probably because it is new and in 6mths I'll never even notice it. Unless there is a relatively quick and easy fix, probably best to leave it alone.
    Yep that's what I would do.

    How many blades in your cutter head??
    3

  14. #14
    Join Date
    Dec 2007
    Location
    Melbourne
    Posts
    1,628

    Default

    The cutter is a round clam shell design, square centre block with rounded segment so on the outside. So I will be on the lookout to change it with something affordable. It isn't the original head which was a 4 blade much safer design.





    Upper part of second top done.



    …..Live a Quiet Life & Work with your Hands

  15. #15
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

    Default

    something like CLR might take the staining out or bleach (if thats the word) the other making it look more uniform?

Page 1 of 2 12 LastLast

Similar Threads

  1. Iron Giant
    By Woodlee in forum METALWORK GENERAL
    Replies: 7
    Last Post: 18th Feb 2012, 08:54 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •