The thing to consider when framing anything is that you should be able to take the item back out of the frame and
be unable to tell that it had ever been in one. Not always strictly necessary and not always possible, but it's an ideal.
In all my 30+ years of framing I have only been asked to do a sports shirt once. I never actually did it. It just wouldn't pay
me. I could certainly make the frame for it but doing all the mounting and wotnot - too much hassle.

I have done a bit
of what you would call 'object' framing. Coins, plates, cake icing, etc. But same thing. Having said that I have never been
presented with such a job for many a year. As for needlework, I have done a fair bit of this, but I don't like all the lacing and
stitching. People who do it all the time will breeze though it.
It takes me too long and is akin to shoving a live octopus into a bottle. Give me a piece ready-stretched and I'll frame it with pleasure.
People who do it all the time will breeze though it. Me, I can't be arsed with it.
If you are a general framer you should be at least a bit prepared to tackle anything. You can gain a lot of info from many sources,
this Forum is as good a place as any. It's as well to have a cursory knowledge on all aspects of the trade, at least then you can approach
things with confidence. But it is as well to wait until you are actually faced with a job before brushing up. No use spending
a lot of time on courses and research for something you may never get to do.
As you go along you will probably find you will tend to focus on certain specialities. As well as this there are also a lot of
peripheral services that are not strictly framing but sort-of allied to the trade. Printing, engraving. That sort of thing.
Dry-mounting/laminating is a skill in itself. Some folks do a lot while some will never do it.
Had a lad in this morning wanting a wood plaque engraved. (For Christmas.

). If I had a computerised router I could have done it.
Restoration. Takes years to learn, but if you can offer it people will beat a path to your door. Even if you don't to get involved with
picture cleaning and such, it's as well to know enough to know when to leave well alone if you get my drift.
It's a good idea to build up a list of go-to guys who do things that you don't do. Then you can give customers the right steer.
So all in all you need to be acquainted with all aspects of the trade but a lot of things you will never need to do.
