I'm pretty sure Tom owned the cars...
He was a successful businessman, he ran taxis and a service station, I think, and that grew into used car sales and then the Lotus agency.
Yes, I'm sure Tom was behind the immaculate presentation because it did the business good. This reached new heights, of course, under John Sheppard after Tom died, but it was at a high standard already.
Apparently the boys wanted to go with the white colour scheme before he died but Tom wouldn't allow it. There's a photo of the Mustang in black in RCN
(June '65) while Tom's vale
notice is from the April issue and gives more details of his racing:
Out of interest, I think the first Geoghegan car to appear in white was the Lotus Elan at Bathurst on April 19 while the Lotus 23B and the Lotus 32 were white for the May Warwick Farm. The 23B had previously raced in black and I'm not sure whether or not it was white at the Sandown Park meeting on April 11. In which case it would have been the first Geoghegan car to turn white in the wake of Tom's passing.
The Lotus Cortina was never white, it passed on to Frank Mellit in black, the Mustang never turned out in black while the Lotuses both changed colour.