HI Lavinia,
I have had a reply from someone from the British Association of Skin Camouflage (BASC) and this is what she wrote. I hope it is helpful:
Moisturers and Skin Camouflage
Traditional skin camouflage has an oil base, which is then set with loose
powder. People who have dry skin and want to use moisturiser and for those
who wish to apply sun protection or their topical medication prior to their
skin camouflage should follow these simple steps:
1. Treat the skin by applying the moisturiser - sun protection - topical
medication (as recommended by manufacturer)
2. wait about 20 minutes for your skin to absorb the product
3. blot off any excess with a disposable tissue
4. apply your skin camouflage over the "treated" skin
No camouflage product can be considered rub-proof, although they are
smudge-proof and once correctly set are waterproof. Durability of the
camouflage depends on where it is placed - if on an area of skin, such as
the nostrils, and you repeatedly blow your nose, then the camouflage will
need reapplying frequently. Stability of the camouflage depends on what
products are used under and over it. It helps if the moisturiser - sun
protection - topical medication is oil-free. Oil free sun protection can
be applied over the set skin camouflage area, providing it is not rubbed
into the skin (the spray on sun protection is very handy as you can then
carefully wipe the product across without disturbing the camouflage).
Also, oil free make-up can be applied over the set camouflage - again care
needs to be taken during application not to disturb the camouflage.
It can be argued that people with oily, combination or normal skin (as
measured in beauty terms) have little or no need for a moisturiser where
their skin camouflage is applied. This is because the oil in the
camouflage acts in the same way as a moisturiser.
People who have an oily skin may find that their camouflage is less stable,
and will need to re-powder frequently. If keeping the camouflaged skin matt
is a problem, then use a powder that is rice based, such as Kryolan's Anti
Shine (available from C H Fox, a 30g pot costs £10.00 (plus P&P)) which is
a microfine, colourless setting powder. BASC tested it during a training
programme, on one of the hottest days of the year (some years ago!!!) and
after several hours all the willing victims had one half of their face
matt, the other side you could fry eggs on!!!