Ballast Question

[mberndt]

I am using Bachmann's Gravel Dark Grey Medium.  When I try to glue it in place, its turns to black and does not hold the grey color.  This also happens when I spray it with just water.  Any suggestions what I can use so that the gravel/ ballast retains its' original color?
Thanks.
Marvin

[Mike C]

 When it dries out again the color will come back . Ballast will always get darker when it gets wet and lighten up when it dries out .

[RGW]

just a side note. many years ago I tried using charcoal ash from my grill as ballast on a branch line. when it dried it has turned white even the rail and into the ground foam.When I added dirt and ground foam over the top,this too turned white when dry.I had to paint it too seal it then re ballast ect..

must have been some chemical reaction between the ash, white glue and alcohol that I spray be for adding glue/water.