Friday, November 11, 2022

No Wet Sanding

Rev. 7-24-2024

 Given the rules, my aversion to scraping, and the health risks associated with every stripper I've see (either methylene chloride, NMP, or high pH) I'm not a fan to start with.

 So the project before my next bottom job will be to pick out a new vacuum sander. I have a DeWalt 1/4-sheet sander that I use with a HEPA vacuum and a Dust Deputy. The vacuum part works find, and the sander was inexpensive and has been very durable. I don't feel cheated, not at all. But removal rates are slow and it is not random orbit (leaves swirls).

The other motivation is that I did some paint testing for Practical Sailor, including 6 types on my boat. All of the copper paints are doing well, but two of the non-copper paints really suck, so there will be some serious sanding involved. 

What are the criteria? 

  • Speed of removal.
  • Appearance and swirls. Within the random orbit class, this is more related to the grit and use than the sander.
  • Vibration. Includes ergonomic shape and padding.
  • Dust collection.
  • Weight. Overhead, it adds up.
  • Price. But the older I get that matters less, as I have learned the value or quality tools.
  • Durability (all of the candidate brands should outlive most DIYs
  • Usability. Includes nimbleness and one-hand operation.
  • Size. Still undecided. If the hull is curved, larger does not put that much more sanding surface on the hull.

 So who's in the running?

  • DeWalt. The RO 5-inch is faster than what I have and only $65.
  • Bosch. The dual mode GET75-6 is expensive but leading the wish list. Supposed to be very fast, but it's near $300. But time saved from sanding bottom paint counts triple on your life score.
  • Porter Cable. They have a 6-inch RO for $160 that is well regarded.
  • Fein. They also make an anti-fouling sanding "fleece" that may fit others.
  • Festool. Had to put it on the list. About double the Bosch for the same size.

In the end I went for the ...

  • Makita BO5041. $129.00
Not the cheapest, but it got great revues for speed of removal and ergonomics from boat building schools.  So far (two years) I'm a fan. A bottom job and many, many home projects. It's not as fast as the dual mode sanders, but it is lighter and is what I needed. For a big bottom job, the Bosch is the boss.


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