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pr0g33k
Sep 17, 2007, 11:51 PM
I am new to this hobby and this forum so I hope you will forgive my ignorance of forum etiquette if I happen to be doing this wrong. I have just purchased the Dumas Osprey and the Dumas Little Shelley Foss for $60 each on Dumas’ discounted kits page of their website. Both models are wood kits. Both are electric powered. The Osprey is 1:12 scale and I will modify the Little Shelly Foss to resemble a tiny harbor tug of about the same size and scale of 1:12 by changing its cabin and pilothouse a bit. I have a few newbie questions regarding building and finishing these models that I hope some kind souls can help me with.

Firstly, Is it a good idea to seal or even paint and/or clearcoat the wood pieces before gluing them together or would doing that reduce the strength of the adhesive bonds (because the CA glue may not adhere to sealed or painted surfaces as well as bare wood or because the glue joint may be weaker because the bond is between two painted surfaces which may separate from the underlying wood) or reduce the flexibility of the wood pieces significantly, causing construction to be more difficult? I ask this because it seems to me that ensuring that all pieces are painted before assembly could only improve the watertightness of the completed boat due to the fact that some areas may not be accessible for painting once assembly is complete.

Secondly, while I see various sanding sealers, primers, gap fillers, paints and clearcoats indentified by brand name individually in posts, I see very few posts that describe what the modeler uses for his complete devised "system". It would be very helpful to learn from a few experienced modelers what brand of sanding sealer, primer, filler paste, paint and clearcoat products they have found work well together for completing the entire finishing process from sealing to clearcoat. This would save me a lot of time, money and trouble trying to sort out what is compatible with what. I understand that I will want to experiment a bit later on as I gain more experience but it would be great to have a point of departure from which to start.

My preference would be a finishing system that includes water-washup acrylic paints. Perhaps even those Ceramcoat or similar craft paints one finds at art and craft stores. It may not be a good option but if it is, then that would be ideal. Otherwise, something that brushes well or can be shot with a cheap Testors single-action, external mix airbrush would be great, too. I have no need for the models to be fuelproof as they are electric powered. Nor do I require the miniscule pigment particles of the tiny expensive bottles of Polly Scale, Model Master Acryls or the like as my models will be 1:12 scale and any details are going to be large and not likely to be obscured by the pigment particles.

My third question is simply this: is it a good idea to run a bead of CA or another type of glue on either side of a bulkhead in order to seal and strengthen the bond between the bulkhead and the inside face of the planking? If not CA, what brand of glue would one recommend?

I thank you all for you patience and indulgence in helping me get a good start in this hobby. I have been inspired and awed by the amazing detail and realism of many of the models I have seen in the forums. The added degree of realism imparted with the weathering effects some have used on their boats are just staggering! I look forward to a long career in this hobby and also being a part of this great community

SD rc boater
Sep 18, 2007, 12:21 AM
I have a question that fits right in. I too am building a Dumas wood boat kit. What epoxy should I use on the OUTSIDE of the hull for best results. Best results being; smooth finish, ease of sanding, etc. Thanks. :)

Umi_Ryuzuki
Sep 18, 2007, 01:02 AM
Perhaps there is a little help in here...

http://www.rcgroups.com/forums/showthread.php?t=346768

This is a good thread on sealing a hull...
http://www.rcgroups.com/forums/showthread.php?t=329811

toesup
Sep 18, 2007, 01:45 AM
Firstly, Is it a good idea to seal or even paint and/or clearcoat the wood pieces before gluing them together or would doing that reduce the strength of the adhesive bonds .....
...that some areas may not be accessible for painting once assembly is complete.

Secondly, while I see various sanding sealers, primers, gap fillers, paints and clearcoats indentified by brand name individually in posts, I see very few posts that describe what the modeler uses for his complete devised "system".

My third question is simply this: is it a good idea to run a bead of CA or another type of glue on either side of a bulkhead in order to seal and strengthen the bond between the bulkhead and the inside face of the planking? If not CA, what brand of glue would one recommend?

Welcome pr0g33k. You will find that there are many modellers here with a VAST experience of boat building and are always willing to help out with your questions. You may get different answers from different people, as there are different prefered methods for ending up with the same finish.

1/ Never having done this i wouldnt know.. but i assume sealing / painting each individual piece before constructing could reduce the strength of the adhesive you are using. If the wood is sealed against water, it will be sealed against the glue also and may not properly bond together.
You should be able to seal / paint as you construct your boat and not have it finished and then think about sealing.. I seal everything below decks that needs sealing before adding the deck for instance...

2/ For each model there is a different 'system' needed. no two construction projects are always the same. Some may use the same method time after time on a particular material, but this has to vary if you change material.
I use at least two coats of sealer over bare wood to seal it against water penetration.. and then at least two coats of paint.. Others i know advocate GF as a sealing medium...

3/ Any strength you can add to a construction is a good idea. A bulkhead / planking joint probably doesnt need another 'fillet' of glue but i always add one anyway. If its an inside joint i use white woodworking glue (sealed and painted afterwards), if its an exterior joint i use CA (again, sealed and painted afterwards).. although there are instances where a CA joint is more than sufficient on any joint.

Others will probably chime in with their methods by the way ;)

Keep asking questions.. and post some pics as your builds progress.. please.

SD rc boater
Sep 18, 2007, 01:59 AM
Thank you Umi, that was exactly what I was looking for. :D

pr0g33k
Sep 18, 2007, 10:28 PM
Thanks for the links Umi. THey kept me busy for a while looking at all the great ideas and equipment. Your suggestions are also helpful Toesup. Many thanks to you both!