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stripping paint from cast iron gutters/downpipes

  • 23-09-2019 11:34am
    #1
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,891 CMod ✭✭✭✭


    am looking at repainting the above, but was wondering what the best approach is to remove old flaky/lumpy paint?
    mechanical, heat, or chemical? i've not tried this so was wondering would it be a bit brittle for trying a wire brush head on a drill?

    ditto with heat, would it create uneven expansion and crack the metal?

    cheers


Comments

  • #2
    banie01
    Registered Users, Registered Users 2 Posts: 17,301 ✭✭✭✭banie01


    Is removing them and getting them dipped an option?
    Or do they need to be done in situ?


  • #3
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,891 CMod ✭✭✭✭magicbastarder


    possibly; i suspect it'll be a bit of a beast to get them down, but it will also be a bit of a beast to be 15 foot up a ladder trying to strip them.
    easiest option would be to replace with PVC, but i want to keep them if i can.


  • #4
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    I've used a torch that you use for torch on felt on cast iron downpipes to melt ice in them so I doubt it would crack them.

    Wire brush in an angle grinder would be my first choice and I'd also try 30-40 grade sanding disks again in an angle grinder. I wouldn't bother with the flapper sander disks as they clog just as quick as plain sanding disks and are massively more expensive.

    Your problem may be its old lead based paint so make sure you wear a dust mask.


  • #5
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,891 CMod ✭✭✭✭magicbastarder


    yeah, i've a dust mask and full face shield (to protect the eyes too) so am covered there.


  • #6
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    Heat from a blow torch would probably be the quickest way as you can get in to all the corners easy enough. Cast iron won't crack too easy and the paint should be burnt off long before you would get to a critical temperature point.
    The only risk would be if you focus the torch on one spot for way to long and get it extremely hot and someone flushes water passed that point at the same time.


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  • #7
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    ^^^^
    Put a sign up "no crapping or pissing while I'm stripping".


  • #8
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,891 CMod ✭✭✭✭magicbastarder


    i can imagine trying to explain that in A&E.


  • #9
    mickuhaha
    Registered Users, Registered Users 2 Posts: 475 ✭✭mickuhaha


    Could you not sandblast them would be quick and get it back to bare metal. It's dusty and needs to be done in dry weather. Try a few stoneworks guys for prices. They normally have portable equipment for graveyards.


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