I cut foam... mostly for H.S. drama club... very light and the drama director loves it... maybe cause i do it for free...
on the chip out... i have found that that happens to me when last pass is very shallow... i use aspire... and they allow u to change the depth of the passes on profile cuts... i made my last pass deeper... .2 or even .25.. and the chip out went away... i was having the problem with wood too. and this approach has been very satisfactory