does anyone have a suggestion on how to remove barnacles and husks from a
fiberglass hull. have already scrapped barnacles but husks remain. any
suggestions on the best way to remove?







The only way I'm aware of is sanding. The marina's I've used in the past have
used a DA (dual action) pneumatic sander after scraping and/or pressure
cleaning. Sanding is usually only done if you need a very smooth bottom. Not
for a normal bottom paint job.

Barry
Barry

Light sandblasting or heavy (3500 psi) pressure cleaning. But you may
have to sand. If must sand, please educate yourself on environmental and
safety requirements prior to sanding. The dust is unhealthy for just
about anything that lives.

Regards,

Capt. Frank
www.home.earthlink.net/~aartworks

F330 GT wrote:

does anyone have a suggestion on how to remove barnacles and husks from a
fiberglass hull. have already scrapped barnacles but husks remain. any
suggestions on the best way to remove?








The only way I'm aware of is sanding. The marina's I've used in the past have
used a DA (dual action) pneumatic sander after scraping and/or pressure
cleaning. Sanding is usually only done if you need a very smooth bottom. Not
for a normal bottom paint job.

Barry
Barry

Would not acid remove them? Muriatic acid eats up most shells.
Bill

"Capt. Frank Hopkins" wrote in message
ink.net...
Light sandblasting or heavy (3500 psi) pressure cleaning. But you may
have to sand. If must sand, please educate yourself on environmental and
safety requirements prior to sanding. The dust is unhealthy for just
about anything that lives.

Regards,

Capt. Frank
www.home.earthlink.net/~aartworks

F330 GT wrote:

does anyone have a suggestion on how to remove barnacles and husks from
a
fiberglass hull. have already scrapped barnacles but husks remain. any
suggestions on the best way to remove?








The only way I'm aware of is sanding. The marina's I've used in the past
have
used a DA (dual action) pneumatic sander after scraping and/or pressure
cleaning. Sanding is usually only done if you need a very smooth bottom.
Not
for a normal bottom paint job.

Barry
Barry

It sure will! Muratic acid will also eat up almost anything else too.
Further, I am not sure what kind of reaction you would get when
introduced to copper bearing paints. It could prove quite dangerous, or
at the very least, incendiary.

Capt. Frank

Calif Bill wrote:

Would not acid remove them? Muriatic acid eats up most shells.
Bill

"Capt. Frank Hopkins" wrote in message
ink.net...

Light sandblasting or heavy (3500 psi) pressure cleaning. But you may
have to sand. If must sand, please educate yourself on environmental and
safety requirements prior to sanding. The dust is unhealthy for just
about anything that lives.

Regards,

Capt. Frank
www.home.earthlink.net/~aartworks

F330 GT wrote:


does anyone have a suggestion on how to remove barnacles and husks from

a

fiberglass hull. have already scrapped barnacles but husks remain. any
suggestions on the best way to remove?








The only way I'm aware of is sanding. The marina's I've used in the past

have

used a DA (dual action) pneumatic sander after scraping and/or pressure
cleaning. Sanding is usually only done if you need a very smooth bottom.

Not

for a normal bottom paint job.

Barry
Barry

Capt. Frank Hopkins wrote:

It sure will! Muratic acid will also eat up almost anything else too.
Further, I am not sure what kind of reaction you would get when
introduced to copper bearing paints. It could prove quite dangerous, or
at the very least, incendiary.

Unless there is something else reactive in the paint,
nothing at all will occur as a result of HCL contacting
copper. HCL is a solvent for Cu oxides however.

Rick

"Rick" wrote in message
hlink.net...
Capt. Frank Hopkins wrote:

It sure will! Muratic acid will also eat up almost anything else too.
Further, I am not sure what kind of reaction you would get when
introduced to copper bearing paints. It could prove quite dangerous, or
at the very least, incendiary.

Unless there is something else reactive in the paint,
nothing at all will occur as a result of HCL contacting
copper. HCL is a solvent for Cu oxides however.

Rick


It will eat the copper. If high enough concentration. Years ago, looked at
neighbors pool and it is 2' high of brown foam. Really nasty looking. The
mom had told the kids to pour in 2 gallons of Clorine, they dumped 2 gallons
of acid. worked on both the plaster and the copper pipes.
Bill

Calif Bill wrote:

It will eat the copper. If high enough concentration.

The chemistry of the reaction between Cu and HCl are well
documented and easily researched on the web. There is no
reaction.

As one who regularly uses highly concentrated HCl to remove
seawater deposits and biological growth including barnacle
cement and "husks" from shipboard machinery I can assure you
it will not "eat" copper or most copper alloys normally used
in marine applications.

HCL will react with oxides of Cu and nearly all of the
components and structure of a home swimming pool as
illustrated by your friends experience.


Rick