Hi Cliff,
3 coats of the epoxy, 3 hours between
coats. The polyurethane was applied immediately after the epoxy tacked up. This
gives better adhesion because the solvents in the topcoat don’t bite into
the hardened epoxy very well, even if it is sanded. I usually use awlgrip as a
topcoat but actually used PPG “Delfleet” on the Great White because
it is available in metallic and is extremely hard. Two coats color and one coat
clear for extra UV protection.
I keep emergency air in a separate bottle
and keep the valve “off” to avoid a possible leak during the dive.
Greg Cottrell
Project Manager
http://www.precisionplastics.com
P please consider the environment before printing this email
From: owner-
Sent: Tuesday, October 12, 2010
2:03 PM
To:
Subject: Re: [PSUBS-MAILIST] K250
on eBay.
Greg, a couple of questions on the paint job. How
many primer coats did you spray with the Interlux2000e? What brand of marine
polyurethane did you use and how many coats? Did you sand between primer
and top coat? If yes, what grit size? Do you have a painting
procedure document that you could share?
I am assuming that since you are not using a second
stage regulator on air system, that you did not install a BIBS. Is this
correct or do you dive with spare tank/regulator for emergencies?
Cliff
From: Greg
Cottrell <greg@precisionplastics.com>
To:
Sent: Tue, October 12, 2010
11:26:46 AM
Subject: RE: [PSUBS-MAILIST] K250
on eBay.
Thanks Frank. It was a fun project. Dan
Lance also contributed a whole lot of welding. I was surprised to find that the
early k-250s didn’t use any stainless parts or even 0-rings. All the
thru-hulls were carbon steel pipe with bronze jam nuts. We cut them all out and
replaced them with 316 ss. There was no flood valve- just a 2” removable threaded
pipe cap.
The sub now has flood valves on each side
where the old motors exited the hull. All electric power goes through a
removable SS plate aft. The MBTs are saddle style. There is a flip up seat so a
second person can lie on the floor. The entire hull was sand/soda blasted and
coated with Interlux 2000e and top coated with marine polyurethane. The air
system has no regulator- it HP all the way- all valves and flex lines are rated
for 6000 psi. The tanks can be remotely filled with a HP whip.
Greg Cottrell
Project Manager
http://www.precisionplastics.com
P please consider the environment before printing
this email
From: owner-
Sent: Tuesday, October 12, 2010
10:53 AM
To:
Subject: Re: [PSUBS-MAILIST] K250
on eBay.
Thanks Ian and Greg. I enjoy
following Scott's activities after seeing his presentation on " El
Rojo Diablo "
Giant squids and especially octopi just
fascinate me.
I'm sorry I missed his visit to the
convention in
Greg......looks like you did a nice job
on the K250 re-fit of Great White. I'll be watching for further adventures with
this boat.
Frank D.