Bit For Composite Decking

[luke]

I have to router several outdoor signs using Home Depot composite decking material. I’ve read several posts commenting on this material but they were devoid of tooling specifics. I am cutting 1.5” letters less than ¼” deep using a PC. What Onsrud bit is best to use? Feed/Speed? I’m guessing an Onsrud double spiral-O 52-624 1/4" but again I have no experience cutting this decking material.

[mikek]

It cuts like butter. A down spiral may work better to keep the fuzz on the edges down. Not sure on feed and speed but it is real soft stuff and cuts real clean.

[luke]

Any specific suggestions.