"Bobsprit" wrote in message
...
That's an awesome statement from someone who can't tell a buffer from a
grinder and uses the grinder to "buff hulls"...

No yard on the planet uses a buffer on a hull, Mooron, at least not one
I've
ever seen. They use big grinders with polish wheels. Polishers don't get
the
job done,

Oh dear!

Get a proper polisher. They do the job just fine!

A toy B&D won't do the job, but a professional polisher will do a 32 footer
in an afternoon.

My club has a proper polisher, and I can testify that it gets the job done
in a fraction of the time.


Regards



Donal
--

"Donal" wrote in message

| My club has a proper polisher, and I can testify that it gets the job done
| in a fraction of the time.


But Bob claims all marinas use "Grinders"... big professional grade
grinders.

CM

Grinders spin way to fast.
"Capt. Mooron" wrote in message
...

"Donal" wrote in message

| My club has a proper polisher, and I can testify that it gets the job
done
| in a fraction of the time.


But Bob claims all marinas use "Grinders"... big professional grade
grinders.

CM

Grinders spin way to fast.

Good lord. My B&D Grinder is 3000-7000 RPM. A brand new Porter Cable POLSIHER #
7336SP is 2500-6000 RPM.
Unless your boat is pretty new, you'll be using the upper RPM ranges once you
know how to handle it. Some grinders do up to 10'000 rpm fixed with NO load,
and even that's fine with a big pad. It slows down a lot when applying
wax/compound. Even skilled autoshops will use them, though paint buring is a
risk.
Sorry, BOB CARROL. I actually own and use these tools, so you can't come in and
hope to make crap up.
BUSTED AGAIN!

RB

Bob, I am a tinsmith and use these tools every day. A grinder has the lowest
speeds you state, and are way to fast for polishing, They also use a much
higher amperage draw than a polisher and will not slow as a polisher will
with pressure. They do not have a variable speed range and will burn
through any gell coat at their rated speeds, read the can a can of compound
from any reputible manufacturer such as 3M or Norton. I am not the one
busted here mister, I am the guy you see using these tools every day to
remove/clean up welds and prepare steel surfaces. If you wish to remove the
gel coat a grinder will work, but to polish, not with out an impossibly
light hand. Besides, read the owners manual and tell me you would polish
with a tool designed for "rapid stock removal with 80 to 100 grit paper and
swirl-free polishing with 120 to 150 grit paper" as stated in the manual on
page 7. These tools are for polishing metal to a high lustre, not for
cleaning up a GRP surface, unless of course you call removal of the gel coat
cleaning up. Go to http://www.porter-cable.com/index.asp for the manual. I
am sure that considering the rated amperage, 3.5 amps the tool you state
will slow enough to polish fine with a careful hand, but it is not a
professinoal grade grinder, it is a professional grade polisher, and
Poarer-Cables grinders use 7.3 to 15 amps and will not slow down enough for
GRP, a grinder is not for polishing a polisher or buffer is for polishing.
..ae=230&search_expr=7336SP&pg=0&search_posted_for m=1
"Bobsprit" wrote in message.
...
Grinders spin way to fast.

Good lord. My B&D Grinder is 3000-7000 RPM. A brand new Porter Cable
POLSIHER #
7336SP is 2500-6000 RPM.
Unless your boat is pretty new, you'll be using the upper RPM ranges once
you
know how to handle it. Some grinders do up to 10'000 rpm fixed with NO
load,
and even that's fine with a big pad. It slows down a lot when applying
wax/compound. Even skilled autoshops will use them, though paint buring is
a
risk.
Sorry, BOB CARROL. I actually own and use these tools, so you can't come
in and
hope to make crap up.
BUSTED AGAIN!

RB

Bob, I am a tinsmith and use these tools every day. A grinder has the lowest
speeds you state, and are way to fast for polishing, They also use a much
higher amperage draw than a polisher and will not slow as a polisher will
with pressure. They do not have a variable speed range and will burn
through any gell coat at their rated speeds, read the can a can of compound
from any reputible manufacturer such as 3M or Norton.

Yes, indeed, you ARE busted. My B&D Grinder and several other's I've seen ARE
VARIABLE. Some DO have variable speed. One of the Porter Cable units I used to
use was also variable. Mine goes down to 2500 RPM, though I use higher RPM
during jobs.

http://www.powertoolservices.com/too...on/6154-70.htm

Meanwhile 3M suggests a max RPM of 3000 RPM, but you can safely exceed that by
a good margin. We certainly haven't damaged any hulls using the B&D. Meanwhile
I've never used ANY grinder that didn't slow down quite a bit with a big polish
pad on it and under load.
Stop talking about stuff you don't know about. I actually work on boats every
year.

RB

Bob, I am a tinsmith


Like I said, if we need tips on the tin parts of our boats (Scotty?) I'll drop
you a line. Other than that I follow what I was taught by professionals who
work with GRP. After 9 years I've had nothing but good results and no damage,
EXCEPT for when I 1st practiced on a already-dead boat at the yard.

RB

If you look at the information you quoted ( Porter-Cable) the grinders are
rated at one speed. Also if you can lean on a 7 amp grinder enough to slow
it down, you have produced enough friction to have already burned through
the gelcoat. Again if 3M recomends a max of 3000 rpm, and you exceed with
sucess I commend you, you were lucky, and very careful. Besides B&D shows
only 2 grinders on their site, both 4 1/2" dia with a speed of 10,000rpm
http://www.blackanddecker.com/produc...owertools.aspx nothing with a
variable speed though. They do show a polisher on that site. Again I have
used many hand held or Snag grinders, none with variable speed, though they
may exist. I work on boats a little more than once a year by the way.
"Bobsprit" wrote in message
...
Bob, I am a tinsmith and use these tools every day. A grinder has the
lowest
speeds you state, and are way to fast for polishing, They also use a much
higher amperage draw than a polisher and will not slow as a polisher will
with pressure. They do not have a variable speed range and will burn
through any gell coat at their rated speeds, read the can a can of
compound
from any reputible manufacturer such as 3M or Norton.

Yes, indeed, you ARE busted. My B&D Grinder and several other's I've seen
ARE
VARIABLE. Some DO have variable speed. One of the Porter Cable units I
used to
use was also variable. Mine goes down to 2500 RPM, though I use higher RPM
during jobs.

http://www.powertoolservices.com/too...on/6154-70.htm

Meanwhile 3M suggests a max RPM of 3000 RPM, but you can safely exceed
that by
a good margin. We certainly haven't damaged any hulls using the B&D.
Meanwhile
I've never used ANY grinder that didn't slow down quite a bit with a big
polish
pad on it and under load.
Stop talking about stuff you don't know about. I actually work on boats
every
year.

RB

By the way , do you own one of those Milwaukee grinders?
"Bobsprit" wrote in message
...
Bob, I am a tinsmith and use these tools every day. A grinder has the
lowest
speeds you state, and are way to fast for polishing, They also use a much
higher amperage draw than a polisher and will not slow as a polisher will
with pressure. They do not have a variable speed range and will burn
through any gell coat at their rated speeds, read the can a can of
compound
from any reputible manufacturer such as 3M or Norton.

Yes, indeed, you ARE busted. My B&D Grinder and several other's I've seen
ARE
VARIABLE. Some DO have variable speed. One of the Porter Cable units I
used to
use was also variable. Mine goes down to 2500 RPM, though I use higher RPM
during jobs.

http://www.powertoolservices.com/too...on/6154-70.htm

Meanwhile 3M suggests a max RPM of 3000 RPM, but you can safely exceed
that by
a good margin. We certainly haven't damaged any hulls using the B&D.
Meanwhile
I've never used ANY grinder that didn't slow down quite a bit with a big
polish
pad on it and under load.
Stop talking about stuff you don't know about. I actually work on boats
every
year.

RB

I am the guy you see using these tools every day to
remove/clean up welds and prepare steel surfaces.


Great. I'll look for some steel surfaces on my boat and call you if I find any
that need work!

Bwahahahaha!

RB