Adhesive advice request

[Darrell]

Sand it, degrease it (brake cleaner works well), apply the adhesive. A good epoxy should be quite permanent. I am not a fan of JB Weld, though.

A PVC pipe or fitting with endcap was my first thought as well. What's objectionable about it? If you want it to be unobtrusive, use the black pipe instead, isn't that ABS? If I made such a container, I'd use pipe cement to glue one end on permanently (following the cement's instructions, of course), and glue a threaded fitting on the other end. You can drop an o-ring into it before twisting on the cap to seal it.

[Rumpshot]

This particular container is a copper gas plug with a cavity and a matching gas cap that covers the cavity. With a round magnet mounted on the base of the plug, and strategically placed where a brass fitting would not be out of place, voila, hidden in plain sight. A piece of pvc, painted or not would just not work.

[Rumpshot]

PVC of various types such as sprinkler heads, plumbing boxes, etc work well in their particular environment for Geocaches. Just place the "fake" fitting in the right setting and it too disappears.

[Catbird]

Do you mean rub the adhesive into place with sandpaper or to clean the surface with the sandpaper?

Both would be ideal. Clean the metal surface with a chemical degreaser. Sand it until it's bright and shiny. Apply a dab of adhesive to the sandpaper and rub it into the metal. Then apply enough adhesive to bond the parts and clamp until cured.

I learned this technique when I was building my RC sailboat. Sanding the epoxy into the metal surface removes any oxides between the adhesive and the metal surface.

[Weetabix]

I do Geocacheing.

Can you recommend any websites that would provide information to someone casually interested in geocaching but not so interested that he'll do deep research first shot out of the chute?

[Rumpshot]

Here.
And here.
Or Wiki

It is a game played by folks of all experience levels. How well can you hide something in plain sight. How well can you deduce the clues once you are at the scene and find the cache. It is amazing how creative people can be. A lot of fun. Family friendly. Youngsters have a great time. Oldsters too.

[Rumpshot]

Oh, theoretically a gps of some sort is required. But you can call up maps and such that will get you close enough that you could do it without. Most smartphones are quite capable.

[McClarkus]

Brownell’s sells a barrel bedding epoxy the consistency of peanut butter. I get it by the gallon and use artists pigments to color it to my needs regarding furniture repair. Rough that copper up real good and this stuff will stick, be waterproof , and not get brittle on you.