Model Boat Mayhem - Forum

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: Brian60 on September 16, 2012, 04:24:30 PM

Title: Applying liquid poly
Post by: Brian60 on September 16, 2012, 04:24:30 PM
Its been sometime since I have used liquid poly on plasticard. The technique used to be use a fine brush to apply it, then when the brush was too hard to use, throw it away.
 Have things moved on over the years? is there a better way of using liquid poly or removing it from bristles so that a brush can be re-used??
Title: Re: Applying liquid poly
Post by: Netleyned on September 16, 2012, 04:44:03 PM
Humbrol Liquid poly comes with a brush that lives in the bottle so stays soft.
Humbrol Poly Cement has a hollow needle applicator.

Both products now sadly moved south to Margate courtesy of Hornby.
Humber Oil Paints I believe made in Hull for decades.

Ned
Grimsby The home of the Best fishing fleet. :-)) :-))

Title: Re: Applying liquid poly
Post by: Brian60 on September 16, 2012, 05:15:47 PM
Thanks for that, I was aware that the liquid poly comes with an applicator brush in the lid. However a lot of intricate work requires a finer brush than that provided, otherwise you get puddles of glue flowing where you don't want it!

Humbrol is indeed still on Hedon Road in Hull, as is the full size spitfire outside of its premises.
Title: Re: Applying liquid poly
Post by: DickyD on September 16, 2012, 05:17:31 PM
Place hard brush in liquid poly and leave till soft, dont take long.  (http://i124.photobucket.com/albums/p8/DickyD_photos/tumb.gif)
Title: Re: Applying liquid poly
Post by: Scribe on September 16, 2012, 07:38:26 PM
The reason that the fine brush becomes hard is that when you apply the poly it also disolves some of the plastic that dries hard on the bristles, and also contaminates the poly in the bottle, which also means that it will not disolve the old stuff from the bristles. I usually decant some of the poly from a new bottle into an old bottle, small amount, and keep topping up with clean fresh stuff from the new bottle till empty. ok2
Title: Re: Applying liquid poly
Post by: NFMike on September 16, 2012, 10:40:56 PM
I 'clean' the brush by holding a piece of folded kitchen roll between my fingers and drawing the brush through to remove excess. It sometimes goes a tad stiff but when I next use it it softens instantly as there isn't much there.
Title: Re: Applying liquid poly
Post by: Capt Podge on September 16, 2012, 11:32:42 PM
For building in plasticard I just use liquid Plasweld, applied with a fine artists brush, it literally "welds" the pieces together in seconds. If I'm not happy with the result, simply dip the brush in the liquid and brush over the "weld" and take the joint apart. Then have another attempt till happy with the result.
The brush itself needs no cleaning. Just let it dry, there will be a bit of a coating on the bristles but this comes straight off when the brush is next dipped into the Plasweld.

....and at approx 2.50 a bottle it is excellent value for money.  :-))

Regards,

Ray.
Title: Re: Applying liquid poly
Post by: Kim on September 16, 2012, 11:40:38 PM
Hi,
Personally for very fine work i use a syringe with hypodermic needle (available in different gauges) not hairs / bristles left behind and you get the glue exactly where you want it.

Interestingly, i have, for courser work moved away from poly weld to Deluxe Craft glue as it seems gives a slight elasticity to the joint.
Regards,
Kim