Been flatting bodywork in preparation for painting next month. decided to use primer to protect bare metal a bit before painting then flat it all back imediately prior to painting.

Also been going through the wiring to the control panel and cutting out , replacing wires etc.
Cleaned the gutters out and treated . only found one piece of serious rust over the drivers door, cut out and welded.
Old sealant removed from around the bottom of the fibreglass roof panel , all resealed and now watertight.
I have noticed some problems with the old paintwork. Before i started to flat it back i noticed a band of pin prick size "craters" all round the van.
when im flatting back i reach the primer almost immediately where its cratered.
on the first panel i did i sprayed it over with primer. the next day there were loads of little brown spots , maybe 1-2 mm across when i ran my hand over they smudged almost as it something was bleeding out of the painwork.
Next pic is the paintwork prior to sanding.

Ive been unable to get a pic of good enough quality to show what it looks like when its bled.
Any ideas what it is???
ive now started to take it back to the original paintwork to remove any trace of contamination.
Note to Phred, Andrea may be doing some welding this week ill post you a pic
A word of caution to anyone doing any sanding down, if your wife has her car parked next to the van, dont let her see it covered in dust, she nearly cut my dangly bits off until i promised to wash it for her

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still not washed it though hehehe
