I am not sure what blocks in particular you were referrinfg to so I will just assumme you like all of them 🙂 JK.
As far as wipeout go vs the size of the block consider this when using them:
They are a good starting point to get the object linework on the canvas. But once you have what you need you may want to explode them so you only keep that instance of the line work you need (some of the blocks may have stacked objects you do not need in your finished product). Then Ctrl+C / Ctrl+Shft+V to paste a new instance of the block. This will keep your drawing size smaller. >> 5mb MAX seems to be my limit for a drawing that I work in everyday (not too laggy), meaning that is the max I allow, I keep the sizes much smaller 1 to 2 meg.
I had a test sheet with something like 32 Bolts and threaded rods on the sheet (full dynamic blocks). That file was 46meg due to all the hidden linework.
If you have common sizes you use perhaps you should copy the blocks I have provided and rip all the extra line work and visstates out. That will save you mainentence on your end once you have your own library setup. I myself like the full set as I find myself making alternate views on things as I am working along. Then I do the cleanup at the end.
NOW FOR YOUR QUESTION 🙂
I have not ran into unwanted shading with the wipeouts. You need to verify that you have the wipeout frames set to the way you work.
If you are using the blocks in a detail and the view is up close you may have some trouble with the wipeout being color 254 depening on your wipeoutframe and TFrame settings. You may see some instances of gray over the desired block object lines. That is the wipeout frame poping up to the top above the other objects.
I run wipeoutframes = 1
Tframes = on
And if I have any line coloring issues in the final plot or PDF I either:
A. Change the wipeout layer to color 0
B. Go back in and send the wipeout to the rear AND Ctrl+X the top Line Work the Ctrl+V to paste in
back in on the top >> That supposedly refreshes the drawing dic (supposedly getting the drawing objects back in order).
Last tip try to keep your number of wipeout vertexes as low as you can. Numerous wipeouts on a sheet with many many vertexcies will make your drawing laggy. If this cannot be avoided at least keep the wipeouts on a separate layer that can be frozen to improve working performance as you perform your daily tasks >> But keep in mind as I indicated previously these types of blocks will make your drawing large in size.
Hope that helps.
-Tim