1953 interior (all interior parts of the pickup cab - 1947-53, I think):
Sheen Gray (Metallic) Poly
PPG/Ditzler: 31104
Dupont: 202-81407
Take a look through past postings in this forum and see what other people have used as interior paint for these years (and who they bought the paint from)

1953 Exterior: Ocean Green
RPO (Regular Production Option #): 234N
PPG/Ditzler: 41375 (now PPG 44621)
Dupont: 93-72002G