Its like deja vu

So Ive made a start on the turrets I say plural as I thought I'd better scrub the sound deadening off on the nearside that looked fine. Turns out it's worse than the driverside. Thankfully it's nowhere near as bad as the Spyder was and hopefully a fairly simple repair. Wasn't expecting to have to do such work but she is 44 years old and as far as I can work out its been at least 15 years since she last had any work and even then its unknown what was done, The previous owner did make enquiries to find out but the info requested was never sent.
As advised better to find it now and deal with it before it spreads and gets a lot worse.
One bit thats a tad annoying it is what I found on the C pillar, I knew there was a tiny rust hole which I intended to drill out and grommet due to location but I found a chunk of filler behind it hence the oblong hole now and welding hear worries me as its mighty close to rear quarter and I don't want to damage the paintwork.
This work and the planned stuff will keep me busy over the winter though