I have read your other post 'My first blunder'. In my view doing what you're proposing would be the second - the magnitude depending on how much of the van you're intending to respray. From the photos on your other post the panel around the damaged area seems to be in reasonable condition, so is it just that small area that you've already had a go at? Blending in to the rest of the panel using rattle cans will be impossible and your attempt will look even worse than what you've already done.
I've tried rattle can spraying twice (yes, I didn't learn my lesson the first time!) - I bought primer, base coat, 2K clear coat (Google 2K and 1K clear coat if you don't know the difference,), 3M mask (2K is lethal stuff - you must wear a high quality mask and do not attempt to work in a confined space), wet and dry sanding sheets in all the right grades of grit, panel wipes, masking tape, masking sheets etc. I researched on Youtube and thought this doesn't look too difficult - I should be able to get a half decent result, my expectations were realistic.
Now I like to think that I'm reasonably intelligent, capable of following instructions and copying someone else in a video. I'm patient, careful and methodical. Unfortunately, it seems I am also completely deluded with the spraying skills of a two year old.
My first job was the upper front and rear door panels, and front wing on my old Mercedes E320 - the original base coat and clear coat had just crazed over completely (perhaps not the original factory finish). The finished result? Despite my best efforts it only looked OK from 100 metres away to the man with the labrador retriever holding a white stick - anybody else was not so impressed.
My second attempt was on my son's Fiat Punto because I really thought I couldn't make a worse job than that first attempt. Admittedly it did involve a bit of filler to smooth out a dent and it was just the rear panel around the wheel and up to the window frame. The result - Oh dear, never mind. There will not be a third time!
If I was you, I'd try something like these stickers
Car Body Repairs - Car Body Repairs UK at AutoStickerOriginal.co.uk - AutoStickerOriginal.com until you can afford do get a professional to do a decent job.
