Homebrew PCBs

Hullo again all,, I am having a bit of a problem with figuring out 
how ,if anyway, one is able to do a touch up when making a transfer 
based on the UV developer method-- I realize that it is likely that 
there is no help there due to the nature of the process itself, but am 
hoping the assumption is wrong?

 I'm not in any trouble here, just curious-- I have way more experience 
with doing the plain-jane TT pcbs's but have most of the equip to do 
both methods (except for a good light source and the right transparency 
materials).

 Also, if there is no method to amend the mistake after making a foul-
up, how easy is it to remove the resulting transfer and just use the 
ol' fashion TT method thereafter? what is the best solvent to use for 
removal?

 Thanks in advance for the help, jd