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Rust spots coming through freshly painted rads despite sanding prior

  • 13-06-2018 9:47pm
    #1
    AineM2013
    Registered Users, Registered Users 2 Posts: 37 ✭


    I prepped my rads prior to painting them today, sanded them down, then washed and dried them before painting with Ronseal 2 in 1 primer and paint for metal and wood.
    While drying spots of rust started coming through the paint.
    Really don’t want to have to sand it all off again as a lot of work went into prepping them beforehand. Just gave them one coat of this paint, they need two coats but I don’t wanna apply it if rust is going to come through.

    Any ideas what I could do?

    Thanks a mil


Comments

  • #2
    dok_golf
    Registered Users, Registered Users 2 Posts: 1,090 ✭✭✭dok_golf


    Get a shellac based stain block, either Zinnsser B.I.N. or Fleetwood Terminator. Paint over the rust stains with this and then paint your topcoat as per normal. The shellac based primers are the only ones that will block rust/water stains properly.


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