It also depends on exactly what you consider "custom" are you planning on ordering a knife to your specs from the shop? If you are, plan on spending some bucks and waiting. (up to several years in some cases)
If you currently have a knife and you want a little work done on it you are pretty limited to what can actually be done. If this is what you are planning to do, I think it pretty much is limited to bead blasting and maybe new handles.
Best to call the shop and see what can be done.
What are you thinking of buying or having done?
