Originally Posted by belchfire
Looks like I may have wasted some primer. I thought that things were close to zero when I shot it but a lot of stuff showed up afterwards. My plan was to get it damn near perfect then shoot it with an epoxy primer-sealer, sand that w/600 & go for color.
You haven't wasted any primer until you've let it get hard in the mixing cup or worse, in your gun. or dropped it on the floor, ALL of witch I have done more than once.
Now that its primed everything your sanding is one material (Primer)and sands at the same rate (like skim coating), just like before when we said STOP when you hit metal, the new rule for the next step is STOP when you hit filler , that primer also makes it easier to SEE (with your eyes) the low spots. getting to see with your hands is something that takes years to learn so seeing is a big help when your learning. Wet sanding is also good for seeing what you have, run a little water over while sanding and the shine shows a lot. you'll get it it just takes time, You are lucky though, us older guys never had a site to go to when we had trouble or you tube. heck we didn't have computors those Atari's were a big hit but would make you guys laugh and get bored within 2 minutes, we 'would play those for hours (table tennis) was all we had.
Sand lightly on your hoods so your not pushing the skin down and think your getting high spots when you go over the little blobs that glue the skin to the inner structure. let the block do the work pressing down will only make you go backwards and waste your time, You'll be saying "all those high spots wernt there before". most times when you hit metal when sanding a hood it'll be those globs so SAND LIGHTLY very lightly. hoods can be tough.
One more thing to remember about the hoods.... those blobs of pooky that glue the skin down to the inner struture or even the inner structure itself can cause problems if you sand too hard, they can be very misleading , you can actually sand a low spot in them .what happens is as the skin bends over the stiffer blob its a high spot but if you keep sanding over it it'll be a low spot when the skin goes back where its supposed to be so it looks like a high but in fact its a low now that's been sanded into it because the area around that spot does not get sanded at all. Think about it. See whats happening?
One more thing} 600 is too fine for paint prep don't go any higher than 400. ,it'll chip easier too. Good luck, I hope I've helped even if its just a little.