The buttstock plug can be easily concealed, as John noted, with an initial shield; except that I would recommend a gold oval and just leave it unengraved (would add a very nice cosmetic touch). The forearm will be the challenge, and I don't know that I have an answer; but it is rather hideous and I too would try to so something to hide the plug. You might considere a diamond shaped horn or ebony inlay. Diamond shaped black inlays are not uncommon on Winchester guns; and, as there is just enough room to accomodate such a properly done inlay, the finished result would likely have the appearance of a special order custom touch. Good luck in whatever you do!