Adjectives normally appear in the postnominal position. Goilo (1972: 47) points out that a handful of adjectives can be either prenominal or postnominal witout change of meaning; these include dushi 'sweet', bunita 'beatiful, fine', bon 'good'. Other prenominal modifiers are either quantifiers (e.g. delaster ‘last’, henter ‘whole’, algun ‘some’, etc.), numerals and ordinals, or belong to a small class of adjectives which have an affective interpretation in the prenominal position (Kouwenberg 2007: 324).
The enclitic plural marker nan can follow either the head noun or the postnominal adjective. Muller (1989) argues that the positional difference marks a semantic difference. Based on his discussion, it seems that where nan follows the adjective, the noun + adjective is more likely to receive a compound interpretation, whereas this is never the case where nan follows the noun; in that case, the noun(PL) + adjective is clearly phrasal.
Also of interest is his (1989: 543ff) discussion of the structural relationship between the adjective and phrasal compounds. In a N + di + N phrasal compound, the adjective may be positioned either after the first N, or after the second N. The second option results in ambiguity, such that the adjective may also be interpreted as modifying the final N only, rather than the compound.
Source: Kouwenberg 2007: 324
Source: Muller 1989: 73
Source: Muller 1989: 545f