I have a few more questions regarding working with PE parts. One site I have been reading says
"The photoetched details are attached to a fret, the same way the plastic is attached to the sprue. The best way to cut them lose is to use a rounded knife blade (I use a no. 10 blade). They must be cut on a hard surface, such as a steel or glass plate, or a cheramic tile, or else they will bend. First, cut about 0.5 mm. from the part, and the remove the remaining fret with a pin file or knife".
This contrasts with another instructional site that says
"The PET Shears from Xuron make cutting PE parts from their sprue easy. They also allow one to trim away any excess, especially those sprue tags. To access the part on the sprue I like to start by removing the outer frame. Once I have removed the outer frame I can easily access the part. Be sure to examine the parts around the one you are removing, you want to leave them as protected as possible. Always keep you PE sprue frames laying flat when not handling them to remove parts. A crease or bend can cause you great difficulties later".
One guy is recommending using a knife blade, another says use xuron shears (which i dont have, but could get if that is the best way to go.
The first guy also says use a very hard surface to cut on, like a tile, or a sheet of glass. Is that what others do? I was planning to just cut the parts on standard green modelling mat...you know that green stuff (made out of dense rubber i think) as i can see my modelling knife being made blunt by a glass or ceramic cutting undersurface
With regard to bending the PE parts, these two guys also have differing opinions. guy 1 says
"Photoetched details often need to be bended, in order to give the appearence of crates, fastening clips, etc. Because the metal is so thin, repeated bending will cause the metal to break. Especially steel will easily break. Heating the piece with a flame first will make the part softer, thus making it possible to bend the part more, but will also make it more likely to bend in the wrong place. Obviously, the heating should be done carefully, so as to not melt the metal.
To bend a part correctly is probably the hardest thing about photoetched details. The best way to do it is to place the part on the edge of your steel plate/glass plate/cheramic tile, place one straight (no. 11) scalpel blade or the blade from a stanley knife on top of one side of the photoetched part (with the sharp edge of the blade along the line that need to be bended), and another no. 11 or stanley knife blade under the other side in the same manner. Then, lift the lower blade to the required angle, while holding upper blade steady. This should give you a sharp edge".
I dont like the idea of heating, and his suggesting to use two knives to achieve a fold suggests to me a strong possibility of scratching the part
guy 2 says the following
"Parts can be "folded" by either using a razor blade or a chisel blade inserted in a hobby knife handle…I prefer the hobby knife setup because it give me greater control and keeps my fingers away from the part in case of slippage.
Be sure to refer to the instructions as to how the part is suppose to look after all folding occurs. You might have to think the process through to get the part into the right shape and size. It can get difficult so take your time and give it some serious thought. I've even cut out piece of paper to represent the part so I can figure the folds before I start on the PE part itself.
If you don't have a PE folding jig, you can use basic tools you already have. A flat machinist steel ruler can be used to hold down the part while you use a razor blade to fold the PE part. You can also use pliers…such as these el-cheapo duck billed pliers that have been in my modeling tool kit for decades. Modelers seem to collect a pelethora of tools, you probably have something useful in your toolbox"
Obviously the first question here is how necessary is the folding jig. I twiould have thought using a straight edge mini steel rule would be the most controllable
The full articles i have been reading are linked below
How to use photo etched parts
How to use Photo Etched parts | Hawkeye's Squawkbox
I get the feeling there is no hard and fast method, though everyone doe have similar basic rules. Perhaps working out the best way is a matter of what suits me the best.
Anyway, hopefully the parts will arrive by the end of the week. Hopefully.