i dont see the diffrence between swapping with 91% alcohol like MANY of us do now.....and using 99% with a rust/corrosion preventative in it in terms of saftey....regaurdless 91% and 99% are BOTH going to be pretty dang flamable....i think i may start using the ISO heet....already got it handy....always got it in my truck...long story but i had water get in there somehowon a fishing trip.......i think it may have been the gigundo water puddle i hit.....wentfishing for 3 or 4 hrs and the drive home i was going up a hill and she just bogged down and died and wouldnt start....started up after i let it sit....out that stuff in it and its fine.....winter i always use it.....and once in a while throught the year......ill let you guys know when i swab with it.......if you guys dont see me posting anywhere on the boards you know i caught on fire.....but i doubt it....i swab with pure 91% now.....i just like the 1% being rust preventative....NOT water or whatever the other 9% is in91% alcohol.....and that stuffwill evaporate even quicker!! i think thats a great idea...rusty duck cleaner has ETHER in it........and alcohol i think...bottles at home....i use that at home now......i like it