Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Engineering Techniques and Materials. => Topic started by: boatmadman on March 12, 2007, 01:17:14 pm

Title: Brass - preparation for painting
Post by: boatmadman on March 12, 2007, 01:17:14 pm

Hi,

What is the best way to prep brass for painting to stop all that paint chipping off 2 days after the job is done?

Thanks

Ian

Title: Re: Brass - preparation for painting
Post by: gribeauval on March 12, 2007, 01:23:07 pm

Go to your local model railway shop and buy an 'etching primer' that they use for painting brass loco kits. ;)

Mike

Title: Re: Brass - preparation for painting
Post by: HS93 (RIP) on March 12, 2007, 01:23:33 pm

This is what you need for it to stay on, as used by steam train enthusiasts


PQ1
 Single Pack Self Etch Primer (for all non-ferrous metals)


 http://www.phoenix-paints.co.uk/sundries.asp

Peter

Title: Re: Brass - preparation for painting
Post by: HS93 (RIP) on March 12, 2007, 01:25:48 pm

sorry to duplicate gribeauval ,but if you look at the times I was posting as you where  Peter

Title: Re: Brass - preparation for painting
Post by: boatmadman on March 12, 2007, 01:29:29 pm

Thanks fella's, much appreciated.

Ian

Title: Re: Brass - preparation for painting
Post by: gribeauval on March 12, 2007, 01:30:50 pm

Quote from: HS93 on March 12, 2007, 01:25:48 pm

sorry to duplicate gribeauval ,but if you look at the times I was posting as you where  Peter

Duplication doesn't matter just so long as the information get passed on!! ;)

Mike

Title: Re: Brass - preparation for painting
Post by: barriew on March 12, 2007, 03:26:02 pm

I understand that this stuff has very limited life, so make sure its fresh ;)

If your local model shop doesn't stock it, Squires do.

Barrie

Title: Re: Brass - preparation for painting
Post by: Subculture on March 12, 2007, 09:07:04 pm

You can also dip the brass in a bath of ferric chloride (the stuff they use for etching PCB's). This chemically etches the surface and will allow any primer to stick to the brass like the proverbial to a blanket.

This works well with other metals too.

Cheaper than buying etch primer, and no limited shelf life.

Andy

Title: Re: Brass - preparation for painting
Post by: White Ensign on March 13, 2007, 08:56:54 am

Working mostly in brass I know that problem.
Small items will be cooked out (if they are soldered) in an old pot.
Bigger items will be cleaned with an old, hard toothbrush and an abrassive cleaning-agent (sorry, don`t know the english word for it) which will be used mostly in the kitchen. Flush it with the shower and dry it with an hair-dryer, as the oxyde will return within 15-30 minutes. Then spray it with an primer, which includes zinc (available as spray-cans in car-shops). This will do a perfect job- never had a problem with t´hat and some of my boats are 15 years old.

Jörg