GeometryHelpers.cs

using UnityEngine;

// @kurtdekker

public static class GeometryHelpers
{
	public static void ApplyMeshScaling( GameObject go, float scale)
	{
		var MeshFilters = go.GetComponentsInChildren<MeshFilter>();

		foreach( var mf in MeshFilters)
		{
			var mesh = mf.mesh;

			var originalVerts = mesh.vertices;
			var verts = new Vector3[ mesh.vertexCount];

			for (int i = 0; i < verts.Length; i++)
			{
				verts[i] = originalVerts[i] * scale;
			}

			mesh.vertices = verts;

			mesh.RecalculateBounds();

			mf.mesh = mesh;

			{
				var mc = mf.GetComponent<MeshCollider>();
				if (mc)
				{
					mc.sharedMesh = mesh;
				}
			}
		}
	}
}