Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 9 of 9
Thread: Talcum powder + undercoat
-
4th May 2010, 11:43 PM #1
Senior Member
- Join Date
- Jul 2009
- Location
- mount riverview nsw
- Age
- 66
- Posts
- 188
Talcum powder + undercoat
Hi guys. has anyone used talcum powder mixed with under coat as a filling aid.
An old shipwright once told me that was how he got a good finish on an old boat he was working on.
I have been stripping the big boat back to the dynal sheath as thirty years of paint is cracking and falling of. I have stripped the aft cabin hatch and housing ( these bits are in the shed) back using paint stripper and the usual mechanical devises and given them 2 coats of yacht primer, one coat of precoat and one coat of precoat mixed 50/50 by volume with cheap baby powder. The 50/50 mix has filled the dynal "dimples" nicely ready for a coat of top coat before fitting back on the boat. Am I doing the wrong thing.
Next question, when refitting the hatch house and misc deck fitting (winches, cleats, etc) should I fit them on the bare dynal with sikaflex or finish the painting then whack the fittings on and seal around the sikaflex with top coat ( my prefered option ).
Ian L
-
4th May 2010 11:43 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Age
- 2010
- Posts
- Many
-
5th May 2010, 12:01 AM #2
Grumpy old Bugga
- Join Date
- May 2003
- Location
- South Oz, the big smokey bit in the middle
- Age
- 67
- Posts
- 4,377
I used to do my model aeroplanes with talc and dope (model aeroplane dope - celulose laquer), then paint over the top, so it might work for you.
Richard
-
5th May 2010, 12:27 AM #3
FISH TILL YOU DIE
- Join Date
- Dec 2008
- Location
- NUBEENA TASMANIA AUSTRALIA
- Age
- 70
- Posts
- 548
I am, showing my age.
In the 1960's, we only had industrial talk.
Very heavy.
Very rigid.
You are better off now.
Paul.I FISH THEREFORE I AM.
-
5th May 2010, 11:52 AM #4
Senior Member
- Join Date
- Jan 2006
- Location
- Greystanes
- Posts
- 104
Are we talking about talcum powder made from TALC
or made from cornflour
I think baby talcum powder is now cornfour
talc was found to have some asbesos in it
-
5th May 2010, 12:50 PM #5
FISH TILL YOU DIE
- Join Date
- Dec 2008
- Location
- NUBEENA TASMANIA AUSTRALIA
- Age
- 70
- Posts
- 548
Industrial Talc, use to be available from where ever you bought your Fibrglass supplies.
With todays HIGH BUILD undercoats, I don't see the need to ruin paint by adding anything to it.
You may be right about cornflower in Talcum powder. I don't really know.
Paul.I FISH THEREFORE I AM.
-
5th May 2010, 01:25 PM #6
AJ
- Join Date
- Jun 2007
- Location
- Aberfoyle Park SA
- Age
- 63
- Posts
- 1,787
Real Talc Talc - Wikipedia, the free encyclopedia interesting
asbestos not found, but talc itself may be carcinogenic
Baby powder probably is cornflour, not talc, despite what the label may/may not say...
-
5th May 2010, 02:05 PM #7
Timber recyclist
- Join Date
- Feb 2009
- Location
- Adelaide - outer south
- Age
- 67
- Posts
- 937
From the baby powder info page on the website of a large well known company :
"Keep powder away from child's face to avoid inhalation, which can cause breathing problems.
Ingredients
Talc, Fragrance"Cheers, Bob the labrat
Measure once and.... the phone rings!
-
5th May 2010, 05:04 PM #8
Yacht Designer & Builder
- Join Date
- Feb 2008
- Location
- Eustis, FL, USA
- Posts
- 2,270
The simple answer is yes, you can add talc. The not so simple truth is how much and what's already in the undercoat. Most all primers have some fillers added; talc, balloons, silica, etc.. If you "over weight" or "over bulk" the primer, the particulates may not remain in "suspension" and possibly a lose of adhesion too.
If you have a good bit of surface imperfections to take care of, do it right and use a skim coat of a filler, then prime as needed to start the smoothing stages. In other words, high build primers are great at smoothing, but very wasteful at leveling. Level the surface, then smooth the surface is the most economical method.
-
5th May 2010, 10:51 PM #9
Senior Member
- Join Date
- Jul 2009
- Location
- mount riverview nsw
- Age
- 66
- Posts
- 188
Gentlemen thank you for all you advice. My memeroy has been jogged re Talc from the fiberglass mob, in fact I used it some years ago on the plastic boat.
Par I hear what you say re filling capabilities of modern paint, but I guess I am a bit lazy and I know I am broke hence trying to use the least amount of paint. The whole exercise is trying to save time also, I only have two days every fortnight to strip and paint 32ft, less rain and club happy hours I should be finished in time to start again.
Bring on retirement.
Ian L
Reply With Quote
Similar Threads
-
difficult undercoat
By bosun in forum FINISHINGReplies: 0Last Post: 8th May 2009, 03:51 PM -
MDF Undercoat
By silkwood in forum FINISHINGReplies: 5Last Post: 5th August 2005, 01:00 AM -
Rotten Stone= Talcum Power?
By joez in forum FINISHINGReplies: 4Last Post: 24th September 2003, 01:24 PM
