Was looking at some photos of MKitten (a si-rex) and noticed how his little 'bandit mask' has darkened. Also he's developing a milk-chocolate patch over his shoulders. Also, his skin has gone from pink to cinnamon coloured.
Anyone else care to share any before and after photos?
He's already got quite dark points even then! If he had been a Siamese, his breeder would likely have been saying 'Seal Point, that one'. (Still haven't found that photo - we have very few until the family started using digital.)
One thing I find difficult to get used to with non-Siamese is pink paw pads. Are MKitten's paw pads brown?
Your use of the 'cinnamon' descriptor would be a giveaway for a chocolate point in a Siamese. (They tend to have cinnamon and 'warmer' colouring than the seals.) I'm afraid I'm at a loss when it comes to rexes though.
The point colour 'options' for Siamese-patterned cats are the same regardless of the breed. If any cat (including moggies) has two copies of the recessive 'cs' colourpoint allele they'll express a Siamese-type pattern. The actual point colour will be a slightly diluted version of one of the standard cat coat colours, eg genetically black cats with cs/cs genotype will have seal points. MKitten is absolutely gorgeous