Berenice
Referring to the polished condition of the plaque, I would think that restoration would depend on the gauge of the brass (I suppose it is brass/bronze?). If a reasonable thickness, the detail could be "freshed" or deepened. If not, the detail could be picked out in a contrasting colour.
I had a dig through Palmer for the details of the men named on the plaque:
(1) "7181 Pte. Shorter, T. Died of Disease, Newcastle 17/1/01 Vol. Coy., 2Mx"
(2) Palmer shows "7148 Pte. Angelorie, F. Died of Disease enteric, Mooi River, 2/6/00 2Mx". However, WO100/195 shows his surname as "Angeloni".
(3) "7165 Pte Masson, J. Died of disease, Newcastle, 25/4/01 Vol. Coy., 2Mx".
(4) "H.Trimlet" as shown on the plaque led me a merry dance. Finally found him on p.348 of WO100/195 as "7166" and a marginal note "disch. to Scottish H as 33425". A check on Palmer shows him as "33425 S/Smh. H.Trimlett, Killed in Action, Brakenlagte, 17/6/00 2 SH".
Best regards
IL.