Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: dan on December 06, 2008, 08:48:52 pm

Title: filler
Post by: dan on December 06, 2008, 08:48:52 pm
hi guys,
im having trouble with the filler im using. im using P38 filler from halfords and every time i try filling it or sanding it breaks off and i have to start all over again  >>:-( what do you all use and where can i get it?


Title: Re: filler
Post by: bosun on December 06, 2008, 09:15:07 pm
Hey Dan
What are you trying to fill, is it a hole? if so how big is it, or is it just a few dents ect.
Bosun
Title: Re: filler
Post by: Stavros on December 06, 2008, 09:40:25 pm
Various things spring to mind
Not rubbing down the hull prior to the application of the filler
Temp in shed/garage to low
Frost damage to filler.......YES it does happen
Old stock
Grease on the hull
Too much or to little hardener


I personally wont use P38 and yours is one reason!!!I use Easy light filler also available in Halfords

Stavros
Title: Re: filler
Post by: dan on December 06, 2008, 10:09:29 pm
thanks for the responce guys,

bosun, I'm using it to full holes, dents, and corners were two bits of plastic card meet.
and thanks Stavros, ill have a look tomorrow what they have.
Title: Re: filler
Post by: gingyer on December 06, 2008, 11:23:07 pm
sounds like your going abit OTT for plasticard using P38
 for plasticard use something like squadron putty or similar plastic model filler
Title: Re: filler
Post by: bosun on December 07, 2008, 01:18:27 am
hy dan
 I am with Stavros on this one, Easy light from Halfords, got to be the best, its in a green and black tin, I might call up the lake tomorrow, if your there we, ll have a chat.
Bosun
Title: Re: filler
Post by: BobF on December 16, 2008, 11:55:33 am
I would suggest trying the melting styrene in plastic weld method. The resulting gunge melts into the joints, and all becomes one. Once hard, about 24 hours it can be sanded, and won't fall off.

I found the same problem as you when trying to form sharp edges to the chine lines of fast electric hulls.

Some styrene sheet appears to have a very waxy feel, don't know if this is causing your problem.
Title: Re: filler
Post by: dan on December 16, 2008, 04:16:02 pm
hi bob,
i hadnt thought of that, ill give it a go next time  :-))
Title: Re: filler
Post by: Max Power on December 16, 2008, 07:42:15 pm
P38 is a polyester resin based filler and will not bond properly to styrene sheet (or any other thermoplastic for that matter). Think about the plastic spreaders sometimes included with the pack of P38, the hardened filler will often just flake off if you flex the spreader.
Title: Try some Milliput
Post by: TCC on December 17, 2008, 02:21:57 am
It's a 2 part epoxy putty, you get 2 rolls of putty, cut off equal amounts off both and knead together and press on.

If it's an area that keeps falling off, make sure it's solid and doesn't flex. I'd also give the background a key of sorts... make it as rough as you can and push the filler in there as much as poss.

Milliput is great stuff for modellers, it not only fills, it can be lathed or you can make moulds with it and cast from them with the same. And if your better than me, you can scuplt awkward parts with it. The best bit is wet hands or a brush will wash it smooth and/or merge the filler with the background seemlessly without sanding.
Title: Re: filler
Post by: dan on December 17, 2008, 08:00:47 am
thanks TTC, where can i get hold of some?
Title: Re: filler
Post by: TCC on December 19, 2008, 05:10:43 pm
thanks TTC, where can i get hold of some?

A model shop.. or maybe some of the better hardware stores will have it as well? But If you have a car, I'd just drive to a model shop as it'd be easier than hunting it down.

There's several types, I think you could just get the basic one? (red box) but there's a fine one that is white... it's made with finer granules I suppose?
Title: Re: filler
Post by: dan on December 19, 2008, 05:55:56 pm
thanks TCC, ill have a look this weekend
Title: Re: filler
Post by: DickyD on December 19, 2008, 06:03:13 pm
Hi if you have one of the Hobby Shop chain near you, they stock it. :-))
Title: Re: filler
Post by: DickyD on December 19, 2008, 06:12:06 pm
Hi Dan get in touch with Malcolm at Cornwall Model Boats, he stocks it.

His delivery is normally very quick (next day )


1.Milliput Epoxy Putty Standard 113g(Fillers & Sealers)2.35

2.Milliput Epoxy Putty Superfine 113g(Fillers & Sealers)4.89

3.Milliput Black 113g(Fillers & Sealers)4.60

http://www.cornwallmodelboats.co.uk/index.html


Cornwall Model Boats
Gull Rock,
Treknow,
Tintagel,
Cornwall,
PL34 0EP
Phone: 01840 770406 (+44 1840 770406 International)
Title: Re: filler
Post by: dan on December 19, 2008, 07:28:54 pm
hi DickyD
that will be easier because the closest model shop is half an hour drive away.
do yo know what the difference is  between the standard and the super fine?

Title: Re: filler
Post by: DickyD on December 19, 2008, 09:02:02 pm
I can only assume the obvious Dan.

Ring Malcolm, he'll tell you as hes a very helpful gent. :-))
Title: Re: filler
Post by: TCC on December 21, 2008, 12:44:06 am
hi DickyD
that will be easier because the closest model shop is half an hour drive away.
do yo know what the difference is  between the standard and the super fine?



Other than one being made with finer 'clay'? the normal dries like a mustardy green colour while the fine is a dirty white. If you're just fillin holes, get the standard.
Title: Re: filler
Post by: Subculture on December 23, 2008, 04:41:21 pm
P38 is a polyester resin based filler and will not bond properly to styrene sheet (or any other thermoplastic for that matter). Think about the plastic spreaders sometimes included with the pack of P38, the hardened filler will often just flake off if you flex the spreader.

Yes but that's mainly because the spreader is flexible, and usually very smooth i.e. no mechanical tooth for the filler to lock onto. Once the spreader gets some use, and thus scratched the filler usually hangs on like the proverbial to a blanket.

I find polyester putties stick just fine to most types of thermoplastics provide you rough them up well to provide a decent key. Epoxy based fillers like Milliput are very tough, but they're also slow drying and more difficult to cut back and blend/feather in.