Using the proper blade will be the most important thing to do. You may want to dial down te speed, as suggested. Scoring a candle just before cutting the profile will help preserve yor blade - the aluminum won't stick to the carbide teeth as easily. Let the blade come to a stop and clean off the excess, so as not to create an ignition source.
Don't worry to much about the heat in the swarf - if you have a long enough hose, the swarf will be more then adequately cooled before it hits the bag. Remember: the energy you put in the swarf is relative to the mass displaced vs. the time it took to displace it, so if you just let the saw do it's job, and make decent sized swarf ( it's a saw, not a grinder ) the pieces won't be hot enough to do any damage, and will be cooled down considerably after they've traversed the hose, being transported by cool air along the way.
Saw, don't "nibble"- the latter may produce tiny and very hot pieces of swarf, and ruin your blade as well as the profile in the process. It may be counter-intuitive, if you're accustomed to wood - especially when the sound kicks in.
Ignore this, and make chips - if you're producing dust you're not pushing hard enough..... Obviously if the saw bogs down you're pushing to hard.... [cool] Good luck.
EDIT: As the former poster mentioned: ( and I failed to.... ) feed slow as the pieces are to be separated - It helps to prevent kickback, and the tendency of small pieces to veer off on unplanned ballistic trajectories...
Regards,
Job
