well i cleaned my first hood last friday and i did alot of research before i got in to this field.let me know what u think. i read phil acklands book(thick book)lol.it was a very easy job i thought and went very smooth, but i had one question that i couldnt find the answer to im my previous book.the fire link inside the exhaust duct,do i need to cover it?i dont beleive i need to because there usually rated for 165 or higher but i would hate to make a stupid mistake that would cost me dearly.i imagine that the link would half to be heated for a few minutes or longer at the rated temp. to melt but you never no.a little history bout my company. we are a hvac/r service company in missouri which ive been doing for bout 15 years.in bussines for myself about a year.we also work on comm. kit. equip. and i found that theres nobody around here that does kit. hoods.all these rest. have companies come from 2 hours away to clean their hoods.so it didnt take me long to figure out this could get me in the door to alot of rest. that might lead to alot of work.in fact ive already got 3 rest. and this is my first week.plus i would like to do other powerwashing stuff to. so well see how it goes.i appreciate any help thanks. chris