You want to get the right balance between resin viscosity and gel time for the infusion layout you're using. So, not knowing anything about your tooling, materials or resin... I'd suggest a few things:
1 - Make sure your resin and mold are the same (elevated) temperature - so heat the resin too. Just let the pails hang out in the hot room with the mold over night. If the 600cps is at "room temperature" the viscosity will be much more usable at 90F / 32C or even higher if you can do it - usually with epoxy uncomfortably hot is ideal. What is the resin system you're using? Some epoxy tooling systems are that viscosity and need to be infused hot (like 40C or more), but most general purpose infusion resins should be lower viscosity...
2 - Don't change / raise the temperature until the resin has all gelled - then you can ramp it up a bit and do a postcure. If you heat it before it gels, you risk changing the vapor pressure situation and potentially having bubbles form or other issues. Once it has gelled hard, go ahead and ramp it up slowly.
3 - I'd suggest leaving your vacuum on and (ideally) dialing it back to 20inHg or so after the part is filled. Leave the vacuum on through the full cure cycle - including the postcure. If you don't have the option of very high vacuum, it is sometimes ok to do the whole shoot at 25inHg or so and just throttle the fill so you don't have trapped air problems. If this is a very light laminate (canoe) then it shouldn't be an issue. Are you using core?
4 - Make sure you have good resin breaks so you don't have over-bleed issues as you wait for the resin to gel...
Good luck! Please post some pictures of the canoe if you can.