What non foundry project did you make today?

Discussion in 'General foundry chat' started by Zapins, Jun 22, 2019.

  1. FishbonzWV

    FishbonzWV Silver Banner Member

    I put my moulding bench to use since it's got a marble top on it.
    This is a marble tombstone from a forgotten cemetery on the back of our business property.
    I discovered the cemetery last fall and started cleanup on it. Only four of the 15 stones that I've found so far are standing.
    This one was the worst, being pushed over by a tree. I need to remove the tree, stump and all, to see if the bottom piece is there.
    This is my first go at repairing a stone. Not perfect, but I can touch up the rough spots if I find the rest of it.

    Melvira.jpg
     
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  2. Petee716

    Petee716 Silver Banner Member

    Nice job on the repair. I doubt you're looking for accolades on the cleanup, but you're getting them from me anyway. If youre so inclined and want to go one better, find a Boy Scout whose looking for his Eagle badge to help you.
    I say that because a boy did exactly that in a town nearby and not only earned his badge but resurrected a treasure in his town.
    Pete
     
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  3. FishbonzWV

    FishbonzWV Silver Banner Member

    I had thought of that but the problem is, my time to work on it is very limited.
    I brought this stone home to repair it because of the complexity of it. Epoxy a piece, let it sit overnight, repeat.
    This is what I'm dealing with. There's 5 of these on YT.
     
  4. Melterskelter

    Melterskelter Silver Banner Member

    Very nice job! And a very kind and generous thing to do! Good on ya!

    Denis
     
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  5. Petee716

    Petee716 Silver Banner Member

    I finally decided to do something with this soft maple chip I've been storing in the shed. It's from the stump of a tree I had cut down about 5 years ago. After the tree men felled the tree they made a through cut closer to the ground and left it about 9" thick. I'm not sure why they did that but I'm sure there was a reason. I left it outside off the ground for a couple years so parts of the center got a little punky but not too awful bad. After I got my new shed a couple years ago it put it inside, so it's pretty dry now. I'm going to cast my girl's family coat-of-arms and family name and inlay them. The Irish seem to like that. Then I plan to encapsulate the entire thing in a thick epoxy and set it up in the flower bed next to the barn easel-style.
    I'll most likely want to paint the aluminum prior to coating with epoxy. I've never used epoxy coating before and I know it won't be a cheap date so I need to do some homework on things like application, compatibility with paint and background stain, etc. so I get this right the first time.

    Any tips would be appreciated.

    I made a leveling jig and frame for my router and took it down to just under 7". I decided my 20x30' workshop didn't have a sufficient layer of dust coating everything so I did it inside. Problem solved. I did have all of my machine tools covered however.

    Pete

    image.jpeg image.jpeg
     
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  6. FishbonzWV

    FishbonzWV Silver Banner Member

  7. Al2O3

    Al2O3 Administrator Staff Member Banner Member

  8. Jason

    Jason Silver Banner Member

    A SUPER SUPER clean environment is really important with that thick epoxy stuff. It will grab stuff floating in the air big time. And you're right, it's not cheap. Lots of work.
     
  9. Peedee

    Peedee Silver

    Don't be tempted to try it with clear PU resins. They are much more 'outdoor' stable but they will find and extract the tiniest percent of moisture in the wood and turn into an incurable foam! I found out the hard way!
     
  10. Petee716

    Petee716 Silver Banner Member

    I made some progress over the last week. My petrobond has gotten pretty weak and it was a tough pull to begin with so I lost some details on the left side of the shield. I'll clean the lines up a bit with an engraving pen before painting.
    Peedee, I'm wondering if I can perform the epoxy coating and then use the PU over it? Only 2 concerns: $ and delamination.


    image.jpeg image.jpeg image.jpeg

    Pete
     
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  11. Melterskelter

    Melterskelter Silver Banner Member

    The question of polyurethane over epoxy seems to come up on wooden boat forums.
    http://forum.woodenboat.com/showthread.php?190380-Polyurethane-top-coat-directly-over-epoxy

    Some of the “better” brand name epoxy makers might be able to tell you how their specific formula will work. It looks like most folks (not all though) recommend a primer and then PU. Even if the manufacturer gives the go ahead, I’d sure try a test piece to see if there is good adhesion and no bleed through.

    Denis

    Edited 7am PDT
     
    Last edited: Oct 7, 2019
  12. Peedee

    Peedee Silver

    Unless the epoxy layer is UV stable it will still yellow under the PU coat. I used clear PU on a wood model, it was sealed well I thoughtbut it still managed to find moisture in the wood and ended a big mess of foamy crap! Not sure if epoxy or polyesters would be available to suit the application, my knowledge is a little lacking on those.

    Edit, that is looking nice!
     
  13. Petee716

    Petee716 Silver Banner Member

    Thanks for your replies. I get from some of epoxy mfgs that an initial thin coating/coatings of the same coating product is sufficient as a primer and to fill holes and bring things up to level before the big pour. I also understand the areas that I'm describing as punky (read rot) will require special attention. Apparently I'll be making a commitment once I begin the project as there's limited windows of coating and recoating time. Although they have definitive answers about how and what you can cover up, they can only give recommended guidelines about what you can put over the top of it. They recommend you test. That's fair but not hugely helpful for obvious reasons. I'll read some more and then get busy.

    Pete
     
  14. DavidF

    DavidF Administrator Staff Member Banner Member

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