yea if your not comfortable dont turn in reverse
,i did it on my siding for my shed , but that was just vinyl so it was very thin, as compared to your PVC boards and such , just get as many teeth as possible , and personally i wouldnt pay more than 30 to 35 dollars,
you'll find one. i use this blade for all my plywood cuts , and when i need a nice clean cut, and its the one i used in reverse on the vinyl siding. I've never treated it with anything, and have had it for several years , it has been kept inside though and has never gotten wet, im sure there are much nicer ones out there , but this is a fairly nice blade , it'll do the trick for you, the PVC isnt going to dull the blade anyway. not for a long long time.
I'm not sure what i paid as I don't have the receipt anymore, but if it was 60 dollars it would not be here.LOL
dont get caught up in the hype Josh ie t-5:
, just buy something in the medium range price and quality , and you'll be happy