Hi,
i have tried using spray paint to coat the armature prior to concreting but not hugely successful-
but that probably doesn't class as ''high volume, low pressure'- and the fumes and overspray,
mess were extreme and the coverage was poor altho better than brush of course - maybe the angle wasn't extreme enough?
i will look into HVLP and see what kind of. equipment that entails but i would ideally like to use less toxic materials as i work in my
backyard- sounds like the epoxy would want spray cabinet and perfect ventilation as well as the space man suit but it all goes into
the air eventually i presume?
For a sculpture i could maybe try powder coating but haven't got a quote
on the price yet. Eventually i still hope to build a house and it would perhaps not be practical to coat a house frame using any of
the above methods which is why i was looking at adjusting the materials. i am immediately wondering if the HVLP system could be
used with something less toxic than epoxy? as the bond is mechanical between the wire and the papercrete (i work in small
batches by hand and press the mix into the wire so it goes throo the mesh) the coating wouldn't make difference however with the
MgPO4 cement, i think it bonds with metal though i will need to look that up- either way, eliminating a time consuming and
possibly expensive step is good in my book! one advantage with a sculpture or a house as opposed to a plane is that if it fails, its
already sitting on the ground...now that i think of it, i wonder what ferrocement boat builders do about the metal-portland thing? a
failure at sea would not be acceptable-maybe they don't use galvanized wire? i have never seen ungalvanized chicken wire.
Billy Birdsall uses nylon net with portland but i have yet to work out how he does this. i think that because of the quick setting time,
spraying MgPO4 cement could ruin the equipment by setting up suddenly (altho seemingly Michael Collins may use a spray
system somehow?) A spray coat of MgPO4 on the wire was a thought if i can find a supplier.
thankyou for the suggestion- will check out the HVLP-i hadn't come across it before
cheers, eo.
On Mon, Feb 11, 2013 at 9:07 AM, Tasha <tashatesla@gmail.com> wrote:
HVLP for chicken wire can be used if you spray at an extreme angle - most of the paint will hit the wire that way.
TASHA
On 2/11/2013 09:02A, Ron Richter wrote:
In the aircraft industry the protection of parts is crucial especially where one can not get to the parts to repair, or correct deficiencies. One of the the things that smaller fabric planes have is a fuselage made of chromemoly tubing. This tubing rusts fast (overnight) so a viable means of protecting it from the elements is crucial. One method of protection is primer. It is generally sprayed on in leght multiple layers. However, the best method is an epoxy primer (also sprayed on but much more durable). Epoxy primer is two part and very unhealthy for humans (in the un-protected state). Good airflow and complete mask assembly is needed if painting in an enclosed area, while if done outside just a mask (respirator) would be sufficient.
If you sprayed this on your chicken wire you would waste a lot of it to overspray, but with an HVLP (high volume low pressure) spray outfit you would lose less. Chicken wire completely encapsulated with epoxy primer would be stable forever.Ron
__._,_.___
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___
