[rheavn]

Genman,
Those that know me know I am pretty picky on stuff I use on my coach. I wouldn't use anything that leaves a mess. I felt I got a better coating all the way back than brushing. The can had a fairly forceful, yet contained spray. I'm actually not sure a longer straw would help that much as I was able to target the spray pretty well.

If your coach has the 110V air compressor mounted on the left side of the genset, your access might be restricted enough that a longer straw might be useful or even necessary. I would think getting a longer straw would be possible. I don't have a source, but just about anything can be found if one looks hard enough.

Since gensets are your profession I would appreciate your opinion if you get a chance to use the spray.