acrylic and Silicone for overflow box and sump

[dartmyth]

i heard if you reverse the circ saw blade it will cut vinyl house siding with out chipping it . i wonder if it work for acrylic also. i'm building a sump and will try this . could work.

I did a lot of siding and skirting for mobile homes and always used a circular saw with the blade in backwards. to cut siding , skirting and plexiglass.