i tried the matrix system on 2 cars. complete system down to epoxy. used their euro clear. i found it to be very brittle , chips very easy.
i use all spi products now and prospray for my colors. the spi stays flexible which prevents chipping. big plus to me. the prospray is an excellent base and about 40% less than ppg. the spi universal clear is also priced very good. cant beat it.