I make my own CDs using an independent Philips Recorder and I can assure you that if you are doing this type of recording the CDs MUST be "MUSIC" or "AUDIO" type CDs. This information is usually shown with/on/or around the Maker's logo.
A CD-RW can be recorded over and over even if it has been finalised but of course, they will have to be unfinalised before recording on it again.
A CD-R can only be recorded on once, so it is wise to use the CD-RW as a master and then use the cheaper CD-Rs to make copies for your friends from that. I am of course, talking about your own recordings only, as to copy professional CDs is illegal.
Don't be fooled by labels that say CD-R and CD-RW Recordable as these are intended for use with PCs only, as I've learned to my cost.
The CD and DVD world in my opinion is a mess and the sooner the manufacturers get their act together and standardise these products the better it will be for us all. At the moment it is very confusing for almost everyone.
For your information, after trial and error,I have found that whilst any make of CD will work with the PC, my Philips likes the Maxell and TDK MUSIC CDs best. Unbeliev-ably even Philips CDs sometimes play up.
Another thing I have learned with the Philips is that when you make a CD-R copy, it will not play on the 'recorded' side of the set but only on the 'Play' side. This is because at the end of the tracks (usually about 18 depending on length of them) the CD automatically finalises whereas the CD-RW will ask you what you want to do, so giving you the chance to erase tracks if you wish.
To add to the confusion, some of the older CD Players will not play later CDs as they are not equipped to read the latest technology.
Hope this helps.