I can see the appeal of the Chris machine but. The need seems to be caused by not thoroughly getting all the varnish and other stuff off between the ribs and/or not using the Snappy Teak or similar product with care after stripping. I have never had to sand or TSP after the strip and renew process. I have always used a strong stripper and strong brushing when ready , doing the whole canoe , then wash it out with a small 11 PSI power washer with an adjustable spray tip hooked up to my hot water line in the garage as far as 75 feet away. This was immediately followed by the Snappy product process in three foot sections with careful use of the two brushes provided and same power wash. The wide open power tip gets everything off , under the gunnels the decks, the sides and tips of the ribs, everything.
Yes , the power washer can be aggressive but if you can't adjust a simple tip and step back or get a little closer when you need to, like you know dancing a good tango, , you shouldn't use it. I tried without the power on my first boat, never again. You need to use saw horses with the canvas sling for easy moving the canoe up the sling to drain as you spray to rinse. A three hour process and ready to go. If you have a hog this is the time to load her up, wet and ready to submit. Maybe a little 320 sanding here and there to remove some fuzz and ready for the raw linseed. Yup, another McGreevy thing. TMI I know.
Dave