How do I paint the inside of a pipe?

gjslsffan Apr 23, 2021

  1. gjslsffan

    gjslsffan Staff Member

    I have many HO scale 1/2', 85' pipes. I want to paint the insides a sort of rustic color, then paint the outside a kind of greenish coated color. I want to use craft type (cheap) paints for this. I am thinking maybe a cotton ball attached to wire for the inside covering.
    Any thoughts or suggestions are most welcome.
  2. Hardcoaler

    Hardcoaler TrainBoard Member

    That IS a puzzler. I'd first check to see how far into each pipe I'd likely see when they were in place on the layout. I'd then mix up a light paint wash of the interior color and dip the ends into it as far as needed. Then, I'd wipe off the color from the exterior and let dry. You'd get good interior coverage without much fuss. You might need multiple coats. This sounds like a neat project. :)
    gjslsffan and Kez like this.
  3. HemiAdda2d

    HemiAdda2d Staff Member TrainBoard Supporter

    Pipe cleaners or something similar from a craft store?
    gjslsffan and Hardcoaler like this.
  4. Dave1905

    Dave1905 TrainBoard Member

    I would take a board and drill a bunch of 1/2" holes in it. Then stick the tubes in the holes and use a can of spray paint or air brush to spray down into the tubes. Let it dry, then turn it over and spray from the other end. I wouldn't worry too much about getting all the way through. Then get some corks or telescoping tubing, put it in the end of the tubes and spray the outside the of tubes the green color (removing the stopper/tubes as soon as possible so they don't get painted in there.)

    If you run a cotton ball through the paint will be very uneven and smeary.
    gjslsffan likes this.
  5. Shortround

    Shortround TrainBoard Member

    How about filling the pipe and then dump it out. The same as what ever was suppose to be in there.
    gjslsffan and Kez like this.
  6. sd90ns

    sd90ns TrainBoard Member

    If the ID of the pipe is 1/2" then I'd get a piece of sponge, the natural stuff works best, about 3/4" in dia. and hot-glue it to the end of a 1/4" wooden dowel.

    Thin the cheap acrylic paint a bit run the pipe over the dowel then sparingly apply the paint to the sponge and pull the sponge back through the pipe.

    Allow the paint to dry completely then repeat until you get the desired level of paint coverage.

    Thoroughly clean the sponge between uses.

    Alternate between ends of pipe to keep the paint even.
    Last edited: Apr 23, 2021
    gjslsffan and dalebaker like this.
  7. COverton

    COverton TrainBoard Member

    Plug one end, pour in (maybe a little thinned...) paint of your choice, stop up the other end, shake vigorously for five seconds, and remove the stoppers, one end at a time. As you unstop each end, set that end on some wax paper or something only semi-absorbent, wait-two-three, and then unstop the other end and place that end onto the same surface, not the same place. Wait-two-three, and then hold it up and have a look with some light. You might have to touch up the inside ends a bit, but don't do that until the original stuff is dry. Probably several hours to be safe.
    gjslsffan likes this.
  8. gjslsffan

    gjslsffan Staff Member

    Wow! Some really great suggestions.. I gotta consider what has been offered. These are intended to be loads of gas type pipe loads, that have a greenish outer coating.
    Thanks guys for the opinions, they are all great.

Share This Page