Take Me To Paint School!

I am sensitive the the stuff and have never been able to afford fresh air system, but at age 70 something will kill me, hopefully not the paint!
I response to the OP question. I use TCP Global out of Ca, They have some stuff that is lower VOC and that is good . DTM epoxy will stick to just about anything. Not sandable, or with reducer can be used as sealer. IF yo hve good old paint/primer and NO rust under it, I have sealed it ith This DTH epoxy primer, IF you can get it to bare metal, always better. Prep real good with oil/wax cleaner. I use filler over the epoxy, Then seal with th epoxy, then high build primer. Then seal. then topcoat.
I use a high solids high build urethane primer and seal that with the DTM epoxy reduced.
Prep is the key we all know. You have painted before so you know any blem will show!!